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Actin-depolymerizing factors 8 and 11 promote root hair elongation at high pH

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Plant Communications 2024年第3期5卷 232-247页

作者： Dong Qian Tian Li Chen Zheng Yue Niu Yingzhi Niu Chengying Li Muxuan Wang Yang Yang Lizhe An Yun Xiang Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations School of Life SciencesLanzhou UniversityLanzhou 730000China These authors contributed equally to this article

A root hair is a polarly elongated single-celled structure that derives from a root epidermal cell and func-tions in uptake of water and nutrients from the surrounding *** reports have demon-strated that short periods of high pH inhibit root hair extension;but the effects of long-term high-pH treat-ment on root hair growth are still ***,we report that the duration of root hair elongation is signicantly prolonged with increasing external pH,which counteracts the effect of decreasing root hair elongation rate and ultimately produces longer root hairs,whereas loss of actin-depolymerizing factor 8 and 11(ADF8/11)function causes shortening of root hair length at high pH(pH 7.4).Accumulation of ADF8/11 at the tips of root hairs is inhibited by high pH,and increasing environmental pH affects the actinlament(F-actin)meshwork at the root hair *** high pH,the tip-focused F-actin meshwork is absent in root hairs of the adf8/11 mutant,actinlaments are disordered at the adf8/11 root hair tips,and actin turn-over is *** and recycling vesicles do not aggregate in the apical region of adf8/11 root hairs at high ***,our results suggest that,under long-term exposure to high extracellular pH,ADF8/11 may establish and maintain the tip-focused F-actin meshwork to regulate polar trafcking of secretory/recycling vesicles at the root hair tips,thereby promoting root hair elongation.

关键词： pH ADF actin Rab GTPase vesicle root hair

The CUL3A–LFH1–UBC15 ubiquitin ligase complex mediates SHORT VEGETATIVE PHASE degradation to accelerate flowering at high ambient temperature

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Plant Communications 2024年第4期5卷 224-238页

作者： Suhyun Jin Geummin Youn Sun Young Kim Taewook Kang Hyun-young Shin Ji-Yul Jung Pil Joon Seo Ji Hoon Ahn Department of Life Sciences Korea UniversitySeoul 02841Republic of Korea Department of Chemistry Seoul National UniversitySeoul 08826Republic of Korea These authors contributed equally to this article.

Ambient temperature affects flowering time in plants,and the MADS-box transcription factor SHORT VEGETATIVE PHASE(SVP)plays a crucial role in the response to changes in ambient *** protein stability is regulated by the 26S proteasome pathway and decreases at high ambient temperature,but the details of SVP degradation are ***,we show that SVP degradation at high ambient temperature is mediated by the CULLIN3–RING E3 ubiquitin ligase(CRL3)complex in Arabidopsis *** identified a previously uncharacterized protein that interacts with SVP at high ambient temperature and contains a BTB/POZ *** named this protein LATE FLOWERING AT HIGH TEMPERATURE 1(LFH1).Single mutants of LFH1 or CULLIN3A(CUL3A)showed late flowering specifically at 27***1 protein levels increased at high ambient *** found that LFH1 interacts with CUL3A in the cytoplasm and is important for SVP–CUL3A complex *** in CUL3A and/or LFH1 led to increased SVP protein stability at high ambient temperature,suggesting that the CUL3–LFH1 complex functions in SVP *** E2 ubiquitin-conjugating enzymes(UBCs)using RING-BOX PROTEIN 1(RBX1),a component of the CRL3 complex,as bait identified ***15 mutants also showed late flowering at high ambient *** vitro and in vivo ubiquitination assays using recombinant CUL3A,LFH1,RBX1,and UBC15 showed that SVP is highly ubiquitinated in an ATP-dependent ***,these results indicate that the degradation of SVP at high ambient temperature is mediated by a CRL3 complex comprising CUL3A,LFH1,and UBC15.

关键词： temperature-responsiveflowering SVP CUL3 proteasomal degradation ubiquitination

Chromosome-scale genome assembly-assisted identification of Brassica napus BnDCPA1 for improvement of plant architecture and yield heterosis

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Plant Communications 2024年第7期5卷 1-4页

作者： Chuanji Zhao Xiaobo Cui Meili Xie Yi Zhang Lingyi Zeng Yueying Liu Junyan Huang Xiong Zhang Chaobo Tong Qiong Hu Lijiang Liu Shengyi Liu Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences Key Laboratory of Biology and Genetic Improvement of Oil CropsMinistry of Agriculture and Rural AffairsWuhanChina These authors contributed equally to this article

Plant architecture can act as a pivotal determinant of crop yield by maximizing photosynthate accumulation in grains,but no *** rapeseed ideotype has yet been ***,semi-dwarf and compact(SDC)rapeseed plant types with the capacity to maximize silique number per hectare and seed weight per silique are expected to optimize plant architecture for groundbreaking seed yield,avoiding lodging and promoting mechanical harvest(Liu et al.,2022).In this study,we report the mutant dc1,which exhibits DC plant architecture with significantly increased silique number in the main inflorescence compared with currently cultivated high and loose(HL)plant types like those of elite cultivars(Figure 1A and Supplemental Figure 1).

关键词： elite cultivar dwarf

The VAMP-associated protein VAP27-1 plays a crucial role in plant resistance to ER stress by modulating ER–PM contact architecture in Arabidopsis

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Plant Communications 2024年第7期5卷 261-279页

作者： Yi Man Yue Zhang Linghui Chen Junhui Zhou Yufen Bu Xi Zhang Xiaojuan Li Yun Li Yanping Jing Jinxing Lin National Engineering Research Center of Tree Breeding and Ecological Restoration College of Biological Sciences and TechnologyBeijing Forestry UniversityBeijing 100083China Key Laboratory of Genetics and Breeding in Fore These authors contributed equally to this article

The endoplasmic reticulum(ER)and the plasma membrane(PM)form ER–PM contact sites(EPCSs)that allow the ER and PM to exchange materials and ***-induced disruption of protein folding triggers ER stress,and the cell initiates the unfolded protein response(UPR)to resist the ***,whether EPCSs play a role in ER stress in plants remains ***-ASSOCIATED MEMBRANE PROTEIN(VAMP)-ASSOCIATED PROTEIN 27-1(VAP27-1)functions in EPCS tethering and is encoded by a family of 10 genes(VAP27-1–10)in Arabidopsis ***,we used CRISPR-Cas9-mediated genome editing to obtain a homozygous vap27-1 vap27-3 vap27-4(vap27-1/3/4)triple mutant lacking three of the key VAP27 family members in *** vap27-1/3/4 mutant exhibits defects in ER–PM connectivity and EPCS architecture,as well as excessive UPR *** further showed that relocation of VAP27-1 to the PM mediates specific VAP27-1-related EPCS remodeling and expansion under ER ***,the spatiotemporal dynamics of VAP27-1 at the PM increase ER–PM connectivity and enhance Arabidopsis resistance to ER *** addition,we revealed an important role for intracellular calcium homeostasis in the regulation of UPR *** together,these results broaden our understanding of the molecular and cellular mechanisms of ER stress and UPR signaling in plants,providing additional clues for improving plant broad-spectrum resistance to different stresses.

关键词： Arabidopsis VAP27-1 ER–PM contact sites ER stress unfolded protein response

Cotton BLH1 and KNOX6 antagonistically modulate fiber elongation via regulation of linolenic acid biosynthesis

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Plant Communications 2024年第7期5卷 138-156页

作者： Tingting Jia Huiqin Wang Shiyan Cui Zihan Li Yongcui Shen Hongbin Li Guanghui Xiao College of Life Sciences Shihezi UniversityShihezi 832003China College of Life Sciences Shaanxi Normal UniversityXi’an 710062China Zhengzhou Research Base State Key Laboratory of Cotton BiologySchool of Agricultural SciencesZhengzhou UniversityZhengzhou 450001China Geosystems Research Institute Mississippi State UniversityStarkvilleMS 39762USA These authors contributed equally to this work

BEL1-LIKE HOMEODOMAIN(BLH)proteins are known to function in various plant developmental ***,the role of BLHs in regulating plant cell elongation is still ***,we identify a BLH gene,GhBLH1,that positively regulates fiber cell *** transcriptomic and biochemical analyses reveal that GhBLH1 enhances linolenic acid accumulation to promote cotton fiber cell elongation by activating the transcription of GhFAD7A-1 via binding of the POX domain of GhBLH1 to the TGGA cis-element in the GhFAD7A-1 *** of GhFAD7A-1 in cotton significantly reduces fiber length,whereas overexpression of GhFAD7A-1 results in longer *** K2 domain of GhKNOX6 directly interacts with the POX domain of GhBLH1 to form a functional heterodimer,which interferes with the transcriptional activation of GhFAD7A-1 via the POX domain of *** of GhKNOX6 leads to a significant reduction in cotton fiber length,whereas knockout of GhKNOX6 results in longer cotton *** examination of the hybrid progeny of GhBLH1 and GhKNOX6 transgenic cotton lines provides evidence that GhKNOX6 negatively regulates GhBLH1-mediated cotton fiber *** results show that the interplay between GhBLH1 and GhKNOX6 modulates regulation of linolenic acid synthesis and thus contributes to plant cell elongation.

关键词： cotton fiber BLH1 KNOX6 linolenic acid biosynthesis fiber cell elongation

Ergothioneine and its congeners:anti-ageing mechanisms and pharmacophore

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Protein & Cell 2024年第3期15卷 191-206页

作者： Li Chen Liping Zhang Xujun Ye Zixin Deng Changming Zhao Department of Geriatrics Zhongnan Hospital of Wuhan UniversityWuhan UniversityWuhan 430072China Key Laboratory of Combinatory Biosynthesis and Drug Discovery School of Pharmaceutical SciencesMinistry of EducationWuhan UniversityWuhan 430072China tThese authors contributed equally.

Ergothioneine,Ovothiol,and Selenoneine are sulfur/selenium-containing histidine-derived natural products widely distributed across different *** exhibit significant antioxidant properties,making them as potential lead compounds for promoting *** evidence suggests that Ergothioneine is positively correlated with healthy ageing and *** mechanisms underlying Ergothioneine's regulation of the ageing process at cellular and molecular levels are beginning to be *** this review,we provide an in-depth and extensive coverage of the anti-ageing studies on Ergothioneine and discuss its possible intracellular targeting *** addition,we highlight the recent efforts in elucidating the biosynthetic details for Ergothioneine,Ovothiol,and Selenoneine,with a particular focus on the study of their pharmacophore-forming enzymology.

关键词： Ergothioneine antioxidant anti-ageing longevity biosynthesis enzymology

The PHYB–FOF2–VOZ2 module functions to finetune flowering in response to changes in light quality by modulating FLC expression in Arabidopsis

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Plant Communications 2024年第7期5卷 231-250页

作者： Lina Qu Ming Zhong Feifei Duan Xinmei Li Jiaxin Yang Quanyu Zhou Dongying Tang Reqing He Xuanming Liu Xiaoying Zhao College of Biology Hunan Province Key Laboratory of Plant Functional Genomics and Developmental RegulationHunan Engineering and Technology Research Center of Hybrid RapeseedHunan UniversityChangsha 410082China Shenzhen Institute Hunan UniversityShenzhen 518057China These authors contributed equally to this article

Proper timing of flowering under different environmental conditions is critical for plant *** quality is a pivotal environmental cue that plays a critical role in flowering *** tend to flower late under light with a high red(R)/far-red(FR)light ratio but early under light with a low R/FR light ***,how plants fine-tune flowering in response to changes in light quality is not well ***,we demonstrate that F-box of Flowering 2(FOF2),an autonomous pathway–related regulator,physically interacts with VASCULAR PLANT ONE-ZINC FINGER 1 and 2(VOZ1 and VOZ2),which are direct downstream factors of the R/FR light receptor phytochrome B(PHYB).We show that PHYB physically interacts with FOF2,mediates stabilization of the FOF2 protein under FR light and end-of-day FR light,and enhances FOF2 binding to VOZ2,which leads to degradation of VOZ2 by SCF^(FOF2) E3 *** contrast,PHYB mediates degradation of FOF2 protein under R light and end-of-day R *** interaction studies demonstrated that FOF2 functions downstream of PHYB to promote FLC expression and inhibit flowering under both high R/FR light and simulated shade conditions,processes that are partially dependent on VOZ *** together,our findings suggest a novel mechanism whereby plants fine-tune flowering time through a PHYB–FOF2–VOZ2 module that modulates FLC expression in response to changes in light quality.

关键词： PHYB FOF2 VOZ proteins FLC light quality flowering time

A simple and efficient in planta transformation method based on the active regeneration capacity of plants

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Plant Communications 2024年第4期5卷 166-176页

作者： Guoguo Mei Ao Chen Yaru Wang Shuquan Li Minyi Wu Yilong Hu Xu Liu Xingliang Hou Guangdong Provincial Key Laboratory of Applied Botany&State Key Laboratory of Plant Diversity and Specialty Crops South China Botanical GardenChinese Academy of SciencesGuangzhou 510650China University of Chinese Academy of Sciences Beijing 100049China These authors contributed equally to this article.

Plant genetic transformation strategies serve as essential tools for the genetic engineering and advanced molecular breeding of ***,the complicated operational protocols and low efficiency of cur-rent transformation strategies restrict the genetic modification of most plant *** paper de-scribes the development of the regenerative activity–dependent in planta injection delivery(RAPID)method based on the active regeneration capacity of *** this method,Agrobacterium tumefaciens is delivered to plant meristems via injection to induce transfected nascent *** transgenic plants can be obtained by subsequent vegetative propagation of the positive nascent *** method was successfully used for transformation of plants with strong regeneration capacity,including different genotypes of sweet potato(Ipomoea batatas),potato(Solanum tuberosum),and bayhops(Ipo-moea pes-caprae).Compared with traditional transformation methods,RAPID has a much higher trans-formation efficiency and shorter duration,and it does not require tissue culture *** RAPID method therefore overcomes the limitations of traditional methods to enable rapid in planta transformation and can be potentially applied to a wide range of plant species that are capable of active regeneration.

关键词： plant genetic transformation RAPID active regeneration sweet potato potato bayhops

Heat stress impairs floral meristem termination and fruit development by affecting the BR-SlCRCa cascade in tomato

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Plant Communications 2024年第4期5卷 208-223页

作者： Junqing Wu Pengxue Li Meng Li Danyang Zhu Haochuan Ma Huimin Xu Shuang Li Jinbo Wei Xinxin Bian Mengyao Wang Yixuan Lai Yuxin Peng Haixiao Li Abidur Rahman Shuang Wu College of Horticulture Haixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhou 350002China Department of Plant Bio-Sciences Faculty of AgricultureIwate UniversityMorioka 020-8550Japan United Graduate School of Agricultural Sciences Iwate UniversityMorioka 020-8550Japan These authors contributed equally to this article

Floral meristem termination is a key step leading to carpel initiation and fruit *** frequent occurrence of heat stress due to global warming often disruptsfloral determinacy,resulting in defective fruit ***,the detailed mechanism behind this phenomenon is largely ***,we identify CRABS CLAW a(SlCRCa)as a key regulator offloral meristem termination in *** func-tions as an indispensablefloral meristem terminator by suppressing SlWUS activity through the TOMATO AGAMOUS 1(TAG1)–KNUCKLES(SlKNU)–INHIBITOR OF MERISTEM ACTIVITY(SlIMA)network.A direct binding assay revealed that SlCRCa specifically binds to the promoter and second intron of WUSCHEL(SlWUS).We also demonstrate that SlCRCa expression depends on brassinosteroid homeostasis in theflo-ral meristem,which is repressed by heat stress via the circadian factor EARLY FLOWERING 3(SlELF3).These results provide new insights intofloral meristem termination and the heat stress response inflowers and fruits of tomato and suggest that SlCRCa provides a platform for multiple protein interactions that may epigenetically abrogate stem cell activity at the transition fromfloral meristem to carpel initiation.

关键词： heat stress floral meristem termination BR-CRC fruit development