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Crop diversity and pest management in sustainable agriculture

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Journal of Integrative agriculture 2019年第9期18卷 1945-1952页

作者： HE Han-ming LIU Li-na Shahzad Munir Nawaz Haider Bashir WANG Yi YANG Jing LI Cheng-yun state key laboratory for conservation and utilization of Bio-resources in Yunnan/Faculty of Plant Protection Yunnan Agricultural University

Large-scale crop monocultures facilitate the proliferation and increasing prevalence of diseases and pest *** studies highlight the impacts of plant diversification upon pathogens,and the population dynamics of insects and beneficial organism in agricultural *** studies provide evidence that habitat manipulation techniques such as intercropping,relay,and rotation can significantly improve disease and pest *** review introduces the concept of crop diversity,considers recent insights and mechanisms underlying crop diversity,and discusses its potential for improving sustainable agricultural ***,the phytobiomes resulting from increased crop diversity are increasingly recognized for their contribution to disease and pest ***,understanding the interactions between pathogens or pests with their host phytobiome may lead to novel options for the prevention of *** advances in the agricultural systems include:(i)a better understanding of the mechanisms of interactions between crop species and genotypes;(ii)ecological progress including a better understanding of the context-dependency of those interactions;and(iii)the role of microtopographic variation in agricultural systems for priming basal resistance to multiple pests and pathogens by intercropped *** also highlight recent progress in China and the potential options for habitat management and design that enhance the ecological role of biodiversity in agroecosystems.

关键词： crop diversity pattern pest and disease management priming resistance phytobiome holobiont sustainability

Target chromosome-segment substitution: A way to breeding by design in rice

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The Crop Journal 2021年第3期9卷 658-668页

作者： Guiquan Zhang Guangdong Provincial key laboratory of Plant Molecular Breeding State Key Laboratory for Conservation and Utilization of Subtropical Agro-BioresourcesSouth China Agricultural UniversityGuangzhou 510642GuangdongChina

Progress in plant breeding depends on the development of genetic resources,genetic knowledge,and breeding *** core of plant breeding is the use of naturally occurring *** the beginning of the post-genomic era,a new concept of"breeding by design"was proposed,which aims to control all allelic variation for all genes of agronomic *** the past two decades,we have applied a three-step strategy for research on rice breeding by *** the first step,we constructed a singlesegment substitution line(SSSL)library using Huajingxian 74(HJX74),an elite xian(indica)rice cultivar,as the recipient in which to assemble genes from the rice AA *** the second step,we identified a series of desirable genes in the SSSL *** the third step,we designed new rice lines,and achieved the breeding goals by pyramiding target genes in the HJX74-SSSL *** review introduces the background,concept,and strategy of breeding by design,as well as our achievements in rice breeding by design using the HJX74-SSSL *** practice shows that target chromosome-segment substitution is a way to breeding by design.

关键词： Gene pool Chromosome-segment substitution Breeding by design Breeding platform Rice

Molecular evolution of rice S_5~n and functional comparison among different sequences

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Chinese Science Bulletin 2011年第19期56卷 2016-2024页

作者： TONG JingFei LI YanHong YANG YouXin SHAHID Muhammad Qasim CHEN ZhiXiong WANG Lan LI JinQuan LIU XiangDong LU YongGen state key laboratory for conservation and utilization of subtropical Agro-bioresources South China Agricultural University Guangzhou510642 China

The wide compatibility gene, S 5 n , can overcome embryo sac sterility between indica and japonica subspecies of rice. Therefore, it is very important to characterize the features of the S 5 n sequence to reveal the origin and evolution of S 5 n . In this paper, 26 cultivated rice haplotypes and 22 wild rice accessions harboring S 5 n were used to sequence S 5 n . The results showed that 15 genotypes among the 48 materials were fully consistent with control cultivar 02428 (CK). The other 33 accessions had different degrees of variation in the S 5 n sequence. Variations in the coding region mainly occurred in the second exon and eight materials showed a 10-bp deletion at 1710–1719 bp, including wild (O. nivara) and cultivated rice, such as IRW501 and Yuetai B. S 5 n sequences were not biased and evolved neutrally. The 48 materials could be divided into 4 categories using a phylogenetic tree of the amino acid sequences. Most of the wild rice clustered together, and the cultivated rice clustered into another group. Eight cultivated rice and O. nivara (wild rice) clustered in another group, which were found to lack 10 consecutive bases in exon 2. Eight rice varieties with high numbers of differences in their S 5 n coding regions were crossed with testers (typically indica and japonica) to produced test cross F 1 populations. The F 1 s were examined for their ability to overcome indica-japonica hybrid sterility. The result showed that the embryo sac fertility of S 5 n -containing hybrids increased significantly compared with control hybrids, but there were no differences among the materials with divergent sequences, indirectly proving that S 5 n is a non-functional gene.

关键词：氨基酸序列水稻品种分子进化功能比较杂种不育广亲和基因第二外显子第2外显子

Nematode-induced trap formation regulated by the histone H3K4 methyltransferase AoSET1 in the nematode-trapping fungus Arthrobotrys oligospora

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Science China(Life Sciences) 2023年第11期66卷 2663-2679页

作者： Qiao Miao Zhengqi Wang Ziyu Yin Xiaoying Liu Ran Li Ke-Qin Zhang Juan Li state key laboratory for conservation and utilization of Bio-resources Key Laboratory for Microbial Resources of the Ministry of EducationSchool of Life SciencesYunnan UniversityKunming 650091China

The methylation of lysine 4 of histone H3(H3K4),catalyzed by the histone methyltransferase KMT2/SET1,has been functionally identified in many pathogenic fungi but remains unexplored in nematode-trapping fungi(NTFs).Here,we report a regulatory mechanism of an H3K4-specific SET1 orthologue,AoSET1,in the typical nematode-trapping fungus Arthrobotrys *** the fungus is induced by the nematode,the expression of AoSET1 is *** of AoSet1 led to the abolishment of ***,the yield of traps and conidia ofΔAoSet1 was significantly lower than that of the WT strain,and the growth rate and pathogenicity were also ***,H3K4 trimethylation was enriched mainly in the promoter of two bZip transcription factor genes(AobZip129 and AobZip350)and ultimately up-regulated the expression level of these two transcription factor *** theΔAoSet1 and AoH3K4A strains,the H3^(K4)me modification level was significantly decreased at the promoter of transcription factor genes AobZip129 and *** results suggest that AoSET1-mediated H3KEme serves as an epigenetic marker of the promoter region of the targeted transcription factor ***,we found that AobZip129 negatively regulates the formation of adhesive networks and the pathogenicity of downstream AoPABP1 and *** findings confirm that the epigenetic regulatory mechanism plays a pivotal role in regulating trap formation and pathogenesis in NTFs,and provide novel insights into the mechanisms of interaction between NTFs and nematodes.

关键词： Arthrobotrys oligospora trap formation epigenetic regulatory histone modification pathogenicity

Effects of ice storm on species richness and abundance of resident birds in subtropical forest in southern China

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Integrative Zoology 2020年第6期15卷 522-532页

作者： Myung-Bok LEE Yongmi HONG Zufei SHU Qiang ZHANG Fasheng ZOU Guangdong key laboratory of Animal conservation and Resource utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhouChina Guangdong Chebaling National Nature Reserve ShixingChina

Between January and February 2008,a severe ice storm occurred in southern *** storm damaged nearly 21 million hectares of forest lands with broken branch,trunk breakage,and stem bending of many *** natural disturbance provides a unique opportunity to study impacts of extreme climatic event on forest *** hierarchical multi-species occupancy model(species richness;27 species)and N-mixture model(abundance;3 species),we investigated how the storm affected resident bird species in subtropical forest in southern *** sampled birds at Chebaling National Nature Reserve in Guangdong Province,monthly for 1 year each before and after the storm by mist *** take into account variations in temperature between years and between months,we incorporated monthly mean temperature into the models as an additional *** species richness was greater before the *** species richness(from the hierarchical model)also tended to be greater before than after the storm although 95%Bayesian credible intervals of these estimates were *** showed a negative effect on estimated species richness,indicating greater species richness during *** three species captured the most,abundance of Chestnut Bulbul(Hemixos castanonotus)significantly decreased after the *** two species,Grey Treepie(Dendrocitta formosae)and Huet’s Fulvetta(Alcippe hueti)showed insignificant responses to the *** study indicates that the 2008 ice storm may not have a significant impact on species richness of resident birds in subtropical forest;however,the effect can be species-specific and negative to some species’population.

关键词： abundance forest birds hierarchical model ice storm species richness

Jack of Many Trades: The Multifaceted Role of miR528 in Monocots

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Molecular Plant 2019年第8期12卷 1044-1046页

作者： Chengjie Chen Yuanlong Liu Rui Xia state key laboratory for conservation and utilization of subtropical AgroBioresources College of HorticultureSouth China Agricultural UniversityGuangzhou 510642China

MicroRNAs (miRNAs) are essential regulators,involved in almost all aspects of plant growth and *** plants,miRNAs prese nt in all an giosperms are regarded as con served miRNAs;in contrast,miRNAs restricted to certain lineages (lessconserved) or a single species (species-specific) constitute the non-conserved miRNAs (Cuperus et al.,2011).Different members of a miRNA family usually target similar target genes from a gene family among different *** in stance,in most analyzed plants,the well-known miR156 family,usually consist!ng of a number of members in a given species,collectively target SQUAMOSA-PROMOTER BINDING PROTEINLIKE (SPL) *** erally,con served miRNAs target genes encoding transcript factors which function in diverse biological *** functional diversity of miRNAs is mainly achieved by the plasticity of their target genes from the same family,such as miR156-targeted SPLs and miR167-targeted ARF (AUXIN RESPONSIVE FACTOR) genes,on regulating distinct downstream gen es.

关键词： Multifaceted Role miR528 Monocots

Two hydroxypyruvate reductases encoded by OsHPR1 and OsHPR2 are involved in photorespiratory metabolism in rice

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Journal of Integrative Plant Biology 2014年第2期56卷 170-180页

作者： Nenghui Ye Guozhen Yang Yan Chen Chan Zhang Jianhua Zhang Xinxiang Peng state key laboratory for conservation and utilization of subtropical Agro-Bioresources South China Agricultural University Shenzhen Research Institute The Chinese University of Hong Kong state key laboratory of Agrobiotechnology The Chinese University of Hong Kong

Mutations in the photorespiration pathway dis- play a lethal phenotype in atmospheric air, which can be fully recovered by elevated C02. An exception is that mutants of peroxisomal hydroxypyruvate reductase （HPR1） do not have this phenotype, indicating the presence of cytosolic bypass in the photorespiration pathway. In this study, we constructed overexpression of the OsHPR1 gene and RNA interference plants of OsHPR1 and OsHPR2 genes in rice （Oryza sativo L. cv. Zhonghua 11）. Results from reverse transcription-polymerase chain reaction （RT-PCR）, Western blot, and enzyme assays showed that HPR1 activity changed significantly in corresponding transgenic lines without any effect on HPR2 activity, which is the same for HPR2. However, metabolite analysis and the serine glyoxylate aminotransferase （SGAT） activity assay showed that the metabolite flux of photorespiration was disturbed in RNAi lines of both HPR genes. Furthermore, HPR1 and HPR2 proteins were located to the peroxisome and cytosol, respectively, by transient expression experiment. Double mutant hprl x hpr2 was generated by crossing individual mutant of hprl and hpr2. The phenotypes of all transgenic lines were determined in ambient air and C02-elevated air. The phenotype typical of photorespiration mutants was observed only where activity of both HPRI and HPR2 were downregulated in the same line. These findings demonstrate that two hydroxypyruvate reductases encoded by OsHPRI and OsHPR2 are involved in photorespiratory metabolism in rice.

关键词： Photorespiration hydroxypyruvate reductase RNAinterference alternative splicing rice (Oryza sativa L.)

Structural and biochemical basis of FLS2-mediated signal activation and transduction in rice

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Plant Communications 2024年第3期5卷 216-231页

作者： Qiaoqiao Zhao Jinlin Bao Huailong Li Wei Hu Yanqiong Kong Yifeng Zhong Qiang Fu Guolyu Xu Fenmei Liu Xi Jiao Jian Jin Zhenhua Ming state key laboratory for conservation and utilization of subtropical Agro-bioresources College of Life Science and TechnologyGuangxi Key Laboratory for Sugarcane BiologyGuangxi UniversityNanning 530004P.R.China

The receptor-like kinase FLAGELLIN-SENSITIVE 2(FLS2)functions as a bacterialflagellin receptor local-ized on the cell membrane of *** Arabidopsis,the co-receptor BRI1-ASSOCIATED RECEPTOR KI-NASE 1(BAK1)cooperates with FLS2 to detect theflagellin epitopeflg22,resulting in formation of a signaling complex that triggers plant defense ***,the co-receptor responsible for recog-nizing and signaling theflg22 epitope in rice remains to be determined,and the precise structural mecha-nism underlying FLS2-mediated signal activation and transduction has not been *** study pre-sents the structural characterization of a kinase-dead mutant of the intracellular kinase domain of OsFLS2(OsFLS2-KDD1013A)in complex with ATP or ADP,resolved at resolutions of 1.98 A˚and 2.09 A˚,*** analysis revealed that OsFLS2 can adopt an active conformation in the absence of phosphorylation,although it exhibits only weak basal catalytic activity for ***-quent investigations demonstrated that OsSERK2 effectively phosphorylates OsFLS2,which reciprocally phosphorylates OsSERK2,leading to complete activation of OsSERK2 and rapid phosphorylation of the downstream substrate receptor-like cytoplasmic kinases OsRLCK176 and *** mass spectrometry experiments,we successfully identied critical autophosphorylation sites on OsSERK2,as well as sites transphosphorylated by ***,we demonstrated the interaction between OsSERK2 and OsFLS2,which is enhanced in the presence *** evidence suggests that OsRLCK176 and OsRLCK185 may function downstream of the OsFLS2-mediated signaling *** study reveals the molecular mechanism by which OsFLS2 mediates signal transduction pathways in rice and provides a valuable example for understanding RLK-mediated signaling pathways in plants.

关键词： FLS2 active conformation kinase activation transphosphorylation signal transduction

The OsAGO2–OsNAC300–OsNAP module regulates leaf senescence in rice

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Journal of Integrative Plant Biology 2024年第11期66卷 2395-2411页

作者： Shaoyan Zheng Junyu Chen Ying He Jingqin Lu Hong Chen Zipeng Liang Junqi Zhang Zhenlan Liu Jing Li Chuxiong Zhuang state key laboratory for conservation and utilization of subtropical Agro-bioresources Guangdong Laboratory for Lingnan Modern AgricultureCollege of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China

Leaves play a crucial role in the growth and development of rice(Oryza sativa) as sites for the production of *** leaf senescence leads to substantial drops in rice *** and how DNA methylation regulates gene expression and affects leaf senescence remains ***,we demonstrate that mutations in rice ARGONAUTE 2(OsAGO2)lead to premature leaf senescence,with chloroplasts in Osago2 having lower chlorophyll content and an abnormal thylakoid structure compared with those from wild-type *** show that OsAGO2 associates with a 24-nt micro RNA and binds to the promoter region of Os NAC300,which causes DNA methylation and suppressed expression of Os *** Os NAC300 causes the similar premature leaf senescence as Osago2 mutants and knocking out Os NAC300 in the Osago2mutant background suppresses the early senescence of Osago2 *** on yeast one-hybrid,dual-luciferase,and electrophoresis mobility shift assays,we propose that Os NAC300 directly regulates transcription of the key rice aging gene NAC-like,activated by APETALA3/PISTILLATA(Os NAP)to control leaf *** results unravel a previously unknown epigenetic regulatory mechanism underlying leaf senescence in which OsAGO2–Os NAC300–Os NAP acts as a key regulatory module of leaf senescence to maintain leaf function.

关键词： DNA methylation leaf senescence OsAGO2 OsNAC300 OsNAP