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The intrinsic developmental age signal defines an age-dependent climbing behavior in cucumber

Horticultural Plant Journal 2024年第3期10卷 797-808页

作者： Zezhou Hong Xinrui Wang Zipei Fan Jiahao Wang Aiyi Yang Guochao Yan Yong He Huasen Wang Zhujun Zhu Yunmin Xu College of Horticulture Science Zhejiang Agriculture and Forestry UniversityHangzhouZhejiang 311300China Key Laboratory of Quality and Safety Control for Subtropical fruit and Vegetable Ministry of Agriculture and Rural AffairsHangzhouZhejiang 311300China collaborative innovation center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province HangzhouZhejiang 311300China

The tendril is a climbing organ in cucurbits and functions in physical support and to avoid shading by neighboring vegetation.However,how cucurbits produce tendrils to obtain climbing ability is largely unknown.In this study,tendril phenotypes were investigated during different developmental stages.Our results revealed that tendril growth exhibited an age-dependent pattern in cucurbits.Tendril growth was inhibited,and the tendril was formed as a short tendril[nonfunctional tendril(nonF-tendril),approximately 0.1 cm]during the seedling stage.In contrast,enhanced cell proliferation and cell expansion led to rapid elongation of the tendril during the climbing stage,and the tendril formed as a functional tendril(F-tendril,approximately 30 cm)to obtain climbing ability.RT-qPCR detection showed that age-dependent tendril growth correlated negatively with the abundance of the conserved age regulator CsmiR156.Defoliation induced CsmiR156 to inhibit CsSPLs,and F-tendril formation and climbing ability were delayed in defoliated cucumbers,which confirmed the role of CsmiR156 in regulating tendril growth in vivo.Additionally,exogenous gibberellin(GA)treatment showed that GA positively regulated tendril growth,and RT-qPCR detection showed that the GA bio-synthetic genes and metabolic genes were affected by age pathway,suggesting that the age pathway depended on GA bio-synthetic and metabolic pathway to regulate cell expansion to determine tendril growth.In summary,our work reveals that change in tendril type is an important marker of phase transition in cucumber,and tendril growth is regulated by an intrinsic developmental age signal,ensuring that the cucumber obtains climbing ability at a suitable age.

关键词： Cucumber Tendril Age CsmiR156 CsSPL Climbing ability

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Tomato CYP94C1 inactivates bioactive JA-lle to attenuate jasmonate-mediated defense during fruit ripening

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Molecular Plant 2024年第4期17卷 509-512页

作者： Tianxia Yang Lei Deng Qinyang Wang Chuanlong Sun Muhammad Ali Fangming Wu Huawei Zhaj Qian Xu Peiyong Xin Shujing Cheng Jinfang Chu Tingting Huang Chang-Bao Li Chuanyou Li Key Laboratory of Seed innovation Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China College of Life Sciences Shandong Agricultural UniversityTai'an 271018China Taishan Academy of Tomato innovation Tai'an 271018China CAS center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China College of Horticulture Science and Engineering Shandong Agricultural UniversityTaian 271018China Institute of Vegetable Qingdao Academy of Agricultural SciencesQingdao 266100China Key Laboratory of Biology and Genetic improvement of Horticultural Crops(North China) Ministry of AgricultureBeijing Vegetable Research CenterBeijing Academy of Agriculture and Forestry SciencesBejing 100097China Frontiers Science center for Molecular Design Breeding(MOE) Department of Plant Genetics and BreedingChina Agricultural UniversityBeijing 100193China

Dear Editor,fruit rot caused by necrotrophic pathogens results in substantial reductions in fruit yield and revenues worldwide(Petrasch et al.,2019).A widespread phenomenon in fleshy fruit species is the susceptibility of ripe fruits to necrotrophs(Silva et al.,2021),which facilitates seed dispersal(Forlani et al.,2019)but causes severe post-harvest losses in production.As most of the nutritional and sensory qualities of fruits are elaborated at the ripening stage(Liu et al.,2015),balancing fruit ripening and pathogen resistance to maintain fruit quality has proven to be challenging.A deeper understanding of the mechanisms underlying the increased susceptibility of fruits to necrotrophs during ripening could lead to new strategies for producing necrotrophy-resistant fruits without compromising ripening-relatedquality.

关键词： susceptibility maintain fruit

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SlBEL11 regulates flavonoid biosynthesis,thus fine-tuning auxin efflux to prevent premature fruit drop in tomato

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Journal of Integrative Plant Biology 2024年第4期66卷 749-770页

作者： Xiufen Dong Xianfeng Liu Lina Cheng Ruizhen Li Siqi Ge Sai Wang Yue Cai Yang Liu Sida Meng Cai-Zhong Jiang Chun-Lin Shi Tianlai Li Daqi Fu Mingfang Qi Tao Xu College of Horticulture Shenyang Agricultural UniversityShenyang 110866China collaborative innovation center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang Province College of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China Key Laboratory for Quality and Safety Control of Subtropical fruits and Vegetables Collaborative Innovation Center for Efficient and Green Production of Agriculture in Mountainous Areas of Zhejiang ProvinceMinistry of Agriculture and Rural AffairsCollege of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China Key Laboratory of Protected Horticulture of Ministry of Education Shenyang 110866China Crops Pathology and Genetic Research Unit United States Department of Agriculture Agricultural Research ServiceWashingtonDC 20250USA Department of Plant Sciences University of CaliforniaDavisCA 95616USA ANGENOVO Oslo 0753Norway Laboratory of fruit Biology College of Food Science and Nutritional EngineeringChina Agricultural UniversityBeijing 100083China

Auxin regulates flower and fruit abscission,but how developmental signals mediate auxin transport in abscission remains unclear.Here,we reveal the role of the transcription factor BEL1-LIKE HOMEODOMAIN11(SlBEL11)in regulating auxin transport during abscission in tomato(Solanum lycopersicum).SlBEL11 is highly expressed in the fruit abscission zone,and its expression increases during fruit development.Knockdown of SlBEL11 expression by RNA interference(RNAi)caused premature fruit drop at the breaker(Br)and 3d post-breaker(Br+3)stages of fruit development.Transcriptome and metabolome analysis of SlBEL11-RNAi lines revealed impaired flavonoid biosynthesis and decreased levels of most flavonoids,especially quercetin,which functions as an auxin transport inhibitor.This suggested that SlBEL11 prevents premature fruit abscission by modulating auxin efflux from fruits,which is crucial for the formation of an auxin response gradient.Indeed,quercetin treatment suppressed premature fruit drop in SlBEL11-RNAi plants.DNA affinity purification sequencing(DAP-seq)analysis indicated that SlBEL11 induced expression of the transcription factor gene SlMYB111 by directly binding to its promoter.Chromatin immunoprecipitation-quantitative polymerase chain reaction and electrophoretic mobility shift assay showed that S.lycopersicum MYELOBLASTOSIS VIRAL ONCOGENE HOMOLOG111(SlMYB111)induces the expression of the core flavonoid biosynthesis genes SlCHS1,SlCHI,SlF3H,and SlFLS by directly binding to their promoters.Our findings suggest that the SlBEL11-SlMYB111 module modulates flavonoid biosynthesis to fine-tune auxin efflux from fruits and thus maintain an auxin response gradient in the pedicel,thereby preventing premature fruit drop.

关键词： abscission auxin flavonoid SlBEL11 tomato

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Revealing the specific regulations of nitric oxide on the postharvest ripening and senescence of bitter melon fruit

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aBIOTECH 2024年第1期5卷 29-45页

作者： Hongwei Wang Ling Li Lili Ma Alisdair R.Fernie Anzhen Fu Chunmei Bai Zhaoze Sang Susu Guo Fan Zhang Qing Wang Yanyan Zheng Jinhua Zuo Key Laboratory of Vegetable Postharvest Processing Ministry of AgricultureBeijing Key Laboratory of Fruits and Vegetable Storage and ProcessingKey Laboratory of Biology and Genetic Improvement of Horticultural Crops(North China)of Ministry of AgricultureKey Laboratory of Urban Agriculture(North)of Ministry of AgricultureBeijing Vegetable Research CenterInstitute of Agro-Products Processing and Food NutritionBeijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Food Science and Biotechnology Tianjin Agricultural UniversityTianjin 300392China Max Planck Institute of Molecular Plant Physiology 14476 Potsdam GolmGermany Institute of Food Science and Technology Chinese Academy of Agricultural SciencesBeijingChina

Bitter melon fruit is susceptible to yellowing,softening,and rotting under room-temperature storage conditions,resulting in reduced commercial value.Nitric oxide(NO)is an important signaling molecule and plays a crucial role in regulating the fruit postharvest quality.In this study,we investigated the effects of NO treatment on changes in sensory and firmness of bitter melon fruit during postharvest storage.Moreover,transcriptomic,metabolomic,and proteomic analyses were performed to elucidate the regulatory mechanisms through which No treatment delays the ripening and senescence of bitter melon fruit.Our results show that differentially expressed genes(DEGs)were involved in fruit texture(CSLE,β-Gal,and PME),plant hormone signal transduction(ACS,JAR4,and AUX28),and fruit flavor and aroma(SUS2,LOX,and GDH2).In addition,proteins differentially abundant were associated with fruit texture(PLY,PME,and PGA)and plant hormone signal transduction(PBL15,JAR1,and PYL9).Moreover,No significantly increased the abundance of key enzymes involved in the phenylpropanoid biosynthetic pathway,thus enhancing the disease resistance and alleviating softening of bitter melon fruit.Finally,differential metabolites mainly included phenolic acids,terpenoids,and flavonoids.These results provide a theoretical basis for further studies on the physiological changes associated with postharvest ripening and senescence of bitter melon fruit.

关键词： Bitter melon NO treatment Postharvest Ripening and senescence

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Molecular Basis of Unique Branching Phenotypes in Salvia splendens and the Role of PSY

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Phyton-International Journal of Experimental Botany 2022年第6期91卷 1211-1226页

作者： Peipei Hong Mei Wang Liting Zhi Hongwei Chen Kefeng Liu Hongli Wang College of Humanities and Urban-Rural Development Beijing University of AgricultureBeijing102206China College of Landscape Architecture Beijing University of AgricultureBeijing102206China beijing collaborative innovation center for eco-environmental improvement with forestry and fruit trees Beijing102206China beijing Engineering Research center of Rural Landscape Planning and Design Beijing102206China

The branching system of higher plants plays a very important role in plant morphogenesis,and the number of branches can directly affect crop yield and the ornamental value of plants.It is a complicated development process involving complex molecular mechanisms.The‘Cailinghong’variety of Salvia splendens is characterized by its great branching ability with the ability to grow into a spherical form naturally,without pinching.To gain insight into the molecular events during the branching development of S.splendens,suppressive subtractive hybridization(SSH)technology was used to screen differentially expressed genes between the erect plant type(strain 35)and the spherical plant type(‘Cailinghong’).In total,96 and 116 unigenes were annotated.Four and eight unigenes up-regulated in‘Cailinghong’and strain 35,respectively,were associated with plant hormone anabolism and signal transduction,suggesting that they participate in the branching process.One of these genes,phytoene synthase(PSY),is a precursor of the new plant hormone group strigolactones.Using the PSY fragment(192 bp)as a template,the cDNA sequence of PSY in S.splendens was cloned and named SsPSY.A relative expression analysis and transgenic test results indicated that SsPSY plays an important role in lateral branch development in‘Cailinghong’.These results provide new insight into the molecular mechanisms underlying branching in S.splendens.

关键词： Lateral branch development differential gene expression Salvia splendens suppression subtractive hybridization library SsPSY

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Mulching broad ridges with a woven polypropylene fabric increases the growth and yield of young pear trees ‘Yuluxiang' in the North China Plain

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Horticultural Plant Journal 2023年第3期9卷 414-424页

作者： Yang Wu Mingde Sun Songzhong Liu Institute of forestry and Pomology Beijing Academy of Agriculture and Forestry SciencesKey Laboratory of Biology and Genetic Improvement of Horticultural Crops(North China)Ministry of Agriculture and Rural AffairsBeijing Engineering Research Center for Deciduous Fruit TreesBeijing 100093China

Unlike traditional ridging, mulching broad ridges with a woven polypropylene fabric (WPF) can reduce soil evaporation during the drought season and avoid long saturation time in the root zone of pear trees during the rainy season. In this study, field experiments were conducted from 2017 to 2020 in a pear orchard in the North China Plain to investigate the effects of mulching broad ridges (0.3 m in height and 2 m in width) with WPF on soil temperature and moisture, nitrogen leaching, vegetative and reproductive growth of young pear trees(Pyrus bretschneideri Rehd.‘Yuluxiang’). The experiments involved two treatments, namely, control (traditional no-ridge planting without mulching) and mulching broad ridges with WPF (RM treatment). The results showed that the RM treatment increased soil moisture and temperature and decreased nitrogen leaching, resulting in vigorous growth of the young pear trees. Moreover, the RM treatment increased the tree trunk cross-sectional area and height of the young pear trees by 37%and 8%in 2020, respectively. The nitrate nitrogen content at the soil layer depth of 0-30 cm was significantly higher in the RM than that in control. Furthermore, the RM treatment significantly increased the fruit yield due to larger tree size. In addition, compared with control, significantly higher fruit soluble solid content of RM treatment was detected in 2020. High precipitation (423 mm) occurred during fruit enlargement stage in 2020, RM treatment decreased the rainfall infiltration in the ridge and the soil moisture in root region, resulting in the improvement of fruit quality, compared with control.Therefore, mulching broad ridges with WPF can be implemented to increase soil moisture during drought season, soil temperature, and nitrate nitrogen content, thereby improving the growth and fruit yield of young pear trees. Additionally, it can reduce soil moisture in the root zone during the rainy season and improve the fruit quality of the trees. Finally, it can reduce nitrate nitrogen leaching, thereby re

关键词： Pyrus bretschneideri Rehd Mulching broad ridges Trunk cross-sectional area Yield efficiency Soil water content Soil temperature

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Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China

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Journal of Mountain Science 2018年第3期15卷 519-531页

作者： MENG Chen NIU Jian-zhi YIN Zheng-cong LUO Zi-teng LIN Xing-na JIA Jing-wei College of Soil and Water Conservation Beijing Forestry University beijing collaborative innovation center for eco-environmental improvement with forestry and fruit trees Beijing University of Agriculture Department of Geography Texas A&M University College Station

Rock fragments have major effect on soil macropores and water movement. However, the characteristics of rock fragments and their relationship with macropore characteristics remain elusive in forest stony soils in northern mountainous area of China. The objectives of this study are to(1) use Industrial Computed Tomography(CT) scanning to quantitatively analyze rock fragment characteristics in intact soil columns in different forest lands and(2) identify the relationship between characteristics of rock fragments and that of the macropores. Intact soil columns that were 100 mm in diameter and 300 mm long were randomly taken from six local forest stony soils in Wuzuolou Forest Station in Miyun, beijing. Industrial CT was used to scan all soil column samples, and then the scanned images were utilized to obtain the three-dimensional(3 D) images of rock fragments and macropore structures. Next, theparameters of the rock fragments and macropore structure were measured, including the volume, diameter, surface area, and number of rock fragments, as well as the volume, diameter, surface area, length, angle, tortuosity and number of macropores. The results showed that no significant difference was found in soil rock fragments content in the 10-30 cm layer between mixed forest and pure forest, but in the 0-10 cm soil layer, the rock fragments in mixed forest were significantly less than in pure forest. The number density of macropores has significant negative correlation with the number of rock fragments in the 0-10 cm soil layer, whereas this correlation is not significant in 10-20 cm and 20-30 cm soil layers. The volume density of macropore was not correlated with the volume density of rock fragments, and there is no correlation between the density of macropore surface area and the density of rock fragment surface area. Industrial CT scanning combined with image processing technology canprovide a better way to explore 3 D distribution of rock fragments in soil. The content of rock fragments in soil is mainly determined by p

关键词：土壤岩石特征和森林中国体积密度山区碎裂扫描图象

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Influence of physiological and environmental factors on the diurnal variation in emissions of biogenic volatile compounds from Pinus tabuliformis

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Journal of environmental Sciences 2019年第7期31卷 102-118页

作者： Jungang Chen Huaxing Bi Xinxiao Yu Yanlin Fu Wenchao Liao College of Soil and Water Conservation Beijing Forestry University Institute of ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University Ji County Station Chinese National Ecosystem Research Network (CNERN) Key Laboratory of State forestry Administration on Soil and Water Conservation Beijing Forestry University beijing Engineering Research center of Soil and Water Conservation Beijing Forestry University Engineering Research center of forestry ecological Engineering Ministry of Education Beijing Forestry University beijing collaborative innovation center for eco-environmental improvement with forestry and fruit trees beijing Water Consulting Co. LTD

Biological volatile organic compounds(BVOCs) have a large influence on atmospheric environmental quality, climate change and the carbon cycle. This study assesses the composition and diurnal variation in emission rates of BVOCs from Pinus tabuliformis, using an enclosure technique. environmental parameters(temperature and light intensity) and physiological parameters(net photosynthetic rate, P_n; stomatal conductance, g_s; intercellular CO_2 concentration, C_i; and transpiration rate, T_r) that may affect emission behavior were continuously monitored. The 10 most abundant compound groups emitted by P. tabuliformis were classified by gas chromatography–mass spectrometry. The dominant monoterpenoid compounds emitted were α-pinene, β-myrcene, α-farnesene and limonene. The diurnal emission rate of BVOCs changed with temperature and light intensity, with dynamic analysis of BVOCs emissions revealing that their emission rates were more affected by temperature than light. The variation in monoterpene emission rates was consistent with estimates of P_n, g_s and T_r. Basal emission rates(at 30 °C,) of the main BVOCs ranged from 0.006 to 0.273 μg^(-1)/(hr g),while the basal ER standardization coefficients ranged from 0.049 to 0.144 °C^(-1). Overall, these results provide a detailed reference for the effective selection and configuration of tree species to effectively prevent and control atmospheric pollution.

关键词： Biogenic volatile organic compounds Pinus tabuliformis Emission rate Monoterpenes

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Gene cloning and expression analysis of limonene synthase in Syringa oblata and S.oblata var.alba

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Journal of forestry Research 2019年第4期30卷 1301-1309页

作者： Zifei Yan Ying Qin Jian Zheng Pingsheng Leng Zenghui Hu College of Landscape Architecture Beijing University of AgricultureBeijing 102206People's Republic of China beijing collaborative innovation center for ecoenvironmental improvement with forestry and fruit trees Beijing 102206People's Republic of China

Syringa species are important ornamentals with strong floral scent,of which monoterpenes are the main component.In this study,a new monoterpene synthase gene,named SoLIM,was collected from the flowers of Syringa oblata and S.oblata var.alba using a homologous cloning method.The full-length cDNA of SoLIM was1746 bp and encoded 581 amino acids.Sequence analysis showed that SoLIM contained the DDxxD and RRx8 W motifs,which are two typical conserved monoterpene synthase motifs,and was thus classified as belonging to the Tpsb subfamily.Using quantitative reverse-transcription PCR,SoLIM was significantly expressed in the petals and pistils of S.oblata and S.oblata var.alba,respectively.SoLIM expression peaked earlier than the D-limonene emissions in the diurnal experiments,but occurred later when D-limonene had peaked during the flowering phase,indicating that differences in SoLIM gene expression and D-limonene emissions existed.The synthesis of floral scent is thus associated with diverse regulatory mechanisms that require further investigation.

关键词： Floral scent Syringa oblata Syringa oblata var alba Limonene synthase gene

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Sorbitol induces flower bud formation via the MADS-box transcription factor EjCAL in loquat

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Journal of Integrative Plant Biology 2023年第5期65卷 1241-1261页

作者： Hong-Xia Xu Dong Meng Qing Yang Ting Chen Meng Qi Xiao-Ying Li Hang Ge Jun-Wei Chen Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhou 310021China beijing Advanced innovation center for Tree Breeding by Molecular Design Beijing Forestry UniversityBeijing 100000China College of forestry Beijing Forestry UniversityBeijing 100083China

Sorbitol is an important signaling molecule in fruit trees. Here, we observed that sorbitol increased during flower bud differentiation(FBD) in loquat(Eriobotrya japonica Lindl.). Transcriptomic analysis suggested that bud formation was associated with the expression of the MADS-box transcription factor(TF) family gene, EjCAL. RNA fluorescence in situ hybridization showed that EjCAL was enriched in flower primordia but hardly detected in the shoot apical meristem. Heterologous expression of EjCAL in Nicotiana benthamiana plants resulted in early FBD. Yeast-one-hybrid analysis identified the ERF12 TF as a binding partner of the EjCAL promoter. Chromatin immunoprecipitation-PCR confirmed that EjERF12 binds to the EjCAL promoter, and β-glucuronidase activity assays indicated that EjERF12 regulates EjCAL expression.Spraying loquat trees with sorbitol promoted flower bud formation and was associated with increased expression of EjERF12 and EjCAL. Furthermore, we identified EjUF3GaT1 as a target gene of EjCAL and its expression was activated by EjCAL. Function characterization via overexpression and RNAi reveals that EjUF3GaT1 is a biosynthetic gene of flavonoid hyperoside. The concentration of the flavonoid hyperoside mirrored that of sorbitol during FBD and exogenous hyperoside treatment also promoted loquat bud formation. We identified a mechanism whereby EjCAL might regulate hyperoside biosynthesis and confirmed the involvement of EjCAL in flower bud formation in planta. Together,these results provide insight into bud formation in loquat and may be used in efforts to increase yield.

关键词： EjCAL flower bud differentiation hyperoside loquat sorbitol

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