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Molecular Control of Male Reproductive Development and Pollen Fertility in Rice

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Journal of Integrative Plant Biology 2012年第12期54卷 967-978页

作者： Jing-Xin Guo Yao-Guang Liu state key laboratory for conservation and utilization of subtropical Agro-bioresources College of Life SciencesSouth China Agricultural University

Anther development and male fertility are essential biological pro- cesses for flowering plants and are important for crop seed produc- tion. Genetic manipulation of male fertility/sterility is critical for crop hybrid breeding. Rice （Oryza sativa L.） male sterility phenotypes, including genic male sterility, hybrid male sterility, and cytoplasmic male sterility, are generally caused by mutations of fertility-related genes, by incompatible interactions between divergent allelic or non-allelic genes, or by genetic incompatibilities between cytoplas-mic and nuclear genomes. Here, we review the recent advances in the molecular basis of anther development and male fertility-sterility conversion in specific genetic backgrounds, and the interactions with certain environmental factors. The highlighted findings in this review have significant implications in both basic studies and rice genetic improvement.

关键词： Anther development cytoplasmic male sterility hybrid sterility male fertility meiosis rice.

Effects of transgenic soybean on growth and phosphorus acquisition in mixed culture system

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Journal of Integrative Plant Biology 2015年第5期57卷 477-485页

作者： Jianna Xie Jia Zhou Xiurong Wang Hong Liao state key laboratory for conservation and utilization of subtropical Agro-bioresources Root Biology CenterSouth China Agricultural University

Transgenic soybean plants overexpressing the Arabidopsis purple acid phosphatase gene AtPAP15 （OXp） or the soybean expansin gene GmEXPB2 （OXe） can improve phosphorous （P） efficiency in pure culture by increasing Apase secretion or changing root morphology. In this study, soybean‐soybean mixed cultures were employed to il uminate P acquisition among plants in mixed stands of transgenic and wild‐type soybean. Our results showed that transgenic soybean plants were much more competitive, and had greater growth and P uptake than wild‐type soybean in mixed culture in both low P calcareous and acid soils. Furthermore, OXe plants had an advantage in calcareous soils when mixed with OXp, whereas the latter performed much better in acid soils. In soybean‐maize mixed culture, transgenic soybean had no impact on maize growth compared to controls in both acid and calcareous soils with different P conditions. As for soybean in＆amp;nbsp;mixed culture, OXp plants had no significant advantages regardless of P availability or soil type, while P efficiency improved in OXe in calcareous soils compared to controls. These results imply that physiological traits could be easily affected by the mixed maize. Transgenic soybean plants with enhanced root traits had more competitive advantages than those with improved root physiology in mixed culture.

关键词： Soybean AtPAP15 GmEXPB2i phosphorus efficiency maize mixed culture

DELLA-GRF4-mediated coordination of growth and nitrogen metabolism paves the way for a new Green Revolution

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Science China(Life Sciences) 2018年第9期61卷 1130-1131页

作者： Kun Ma Yao-Guang Liu state key laboratory for conservation and utilization of subtropical Agro-Bioresources College of Life Sciences South China Agricultural University

The Green Revolution （GR） based on semi-dwarf breeding has greatly increased cereal crop yields since the 1960＇*** to appropriate plant height, the semi-dwarf crop plants are beneficial to increase light utilization and improve the lodging-resistance, and eventually increase yield potential （Hedden, 2003）. During the past 50 years, the worldwide application of semi-dwarf crop breeding has produced plenty of elite varieties. The characters of Green Revolution varieties （GRVs） are caused by the mutant growth-repressing genes.

关键词：新陈代谢格林生长道路协作世界范围氮庄稼

Molecular mechanisms underlying phosphate sensing, signaling, and adaptation in plants

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Journal of Integrative Plant Biology 2014年第3期56卷 192-220页

作者： Zhaoliang Zhang Hong Liao William J.Lucas Department of Plant Biology College of Biological Sciences University of California state key laboratory for conservation and utilization of subtropical Agro‐Bioresources Root Biology Center South China Agricultural University

As an essential plant macronutrient, the low availability of phosphorus （P） in most soils imposes serious limitation on crop production. Plants have evolved complex responsive and adaptive mechanisms for acquisition, remobilization and recycling of phosphate （Pi） to maintain P homeostasis. Spatio-temporal molecular, physiological, and biochemical Pi deficiency responses developed by plants are the consequence of local and systemic sensing and signaling pathways. Pi deficiency is sensed locally by the root system where hormones serve as important signaling components in terms of developmental reprogramming, leading to changes in root system architecture. Root-to-shoot and shoot-to-root signals, delivered through the xylem and phloem, respectively, involving Pi itself, hormones, miRNAs, mRNAs, and sucrose, serve to coordinate Pi deficiency responses at the whole-plant level. A combination of chromatin remodeling, transcriptional and posttranslational events contribute to globally regulating a wide range of Pi deficiency responses. In this review, recent advances are evaluated in terms of progress toward developing a comprehen- sive understanding of the molecular events underlying control over P homeostasis. Application of this knowledge, in terms of developing crop plants having enhanced attributes for P use efficiency, is discussed from the perspective of agricultural sustainability in the face of diminishing global P supplies.

关键词： Adaptation crop engineering strategies hormone networks local and long-distance sensing phosphate P use efficiency stress responses systemic signaling transcriptional regulation transport systems

Physiological,transcriptome and gene functional analysis provide novel sights into cadmium accumulation and tolerance mechanisms in kenaf

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Journal of Environmental Sciences 2024年第3期137卷 500-514页

作者： Shan Cao Meng Wang Jiao Pan Dengjie Luo Samavia Mubeen Caijin Wang Jiao Yue Xia Wu Qijing Wu Hui Zhang Canni Chen Muzammal Rehman Sichen Xie Ru Li Peng Chen Guangxi key laboratory of Agro-environment and agric-products safety Key Laboratory of Plant Genetics and BreedingCollege of AgricultureGuangxi UniversityNanning 530004China state key laboratory for conservation and utilization of subtropical Agro-bioresources College of Life Science and TechnologyGuangxi UniversityNanning 530004China

Kenaf is considered to have great potential for remediation of heavy metals in ***,studies on molecular mechanisms of root Cd accumulation and tolerance are still *** this study,two differently tolerant kenaf cultivars were selected as materials and the physiological and transcriptomic effects were evaluated under Cd *** study showed that 200μmol/L CdCl_(2) treatment triggered the reactive oxygen species(ROS)explosion and membrane lipid *** with the Cd-sensitive cultivar‘Z',the Cd-tolerant cultivar‘F'was able to resist oxidative stress in cells by producing higher antioxidant enzyme activities and increasing the contents of ascorbic acid(AsA)and glutathione(GSH).The root cell wall of‘F'exhibited higher polysaccharide contents under Cd treatment,providing more Cd-binding *** were 3,439 differentially expressed genes(DEGs)that were co-regulated by Cd treatment in two *** biosynthesis and plant hormone signal transduction pathways were significantly enriched by functional annotation *** associated with pectin,cellulose,and hemi-cellulose metabolism were involved in Cd chelation of root cell wall;V-ATPases,ABCC3 and Narmp3 could participated in vacuolar compartmentalization of Cd;PDR1 was responsible for Cd effux;the organic acid transporters contributed to the absorption of Cd in *** genes might have played key roles in kenaf Cd tolerance and Cd ***,HcZIP2 was identified to be involved in Cd uptake and transport in *** findings provide a deeper understanding of the molecular pathways underlying Cd accumulation and detoxification mechanisms in kenaf.

关键词： Kenaf Cd stress Physiological Transcriptome HcZIP2

Prospects of utilization of inter-subspecific heterosis between indica and japonica rice

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Journal of Integrative agriculture 2020年第1期19卷 1-10页

作者： ZHANG Gui-quan Guangdong Provincial key laboratory of Plant Molecular Breeding State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources/College of AgricultureSouth China Agricultural University

The Asian cultivated rice(Oryza sativa L.) grown worldwide is divided into two subspecies, indica and japonica. It is well known that the heterosis of inter-subspecies is usually stronger than that of intra-subspecies. Since the 1970 s, indica hybrid rice, an intra-subspecific hybrid rice, has being widely used in China and even in the world. However, the inter-subspecific hybrid rice between indica and japonica is still unavailable. The major obstacle is the hybrid sterility of the inter-subspecies. In recent decades, the genetic and molecular basis of indica-japonica hybrid sterility was understood more and more clearly. Some breeding approaches for overcoming inter-subspecific hybrid sterility were proposed and used to develop the indicajaponica hybrid rice. The updated understanding will offer new approaches for development of breeding lines for overcoming indica-japonica hybrid sterility, which facilitates developing of inter-subspecific hybrid rice.

关键词： heterosis reproductive isolation hybrid sterility genetic basis molecular mechanism subspecies hybrid rice

The autophagy gene ATG8 affects morphogenesis and oxidative stress tolerance in Sporisorium scitamineum

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Journal of Integrative agriculture 2019年第5期18卷 1024-1034页

作者： ZHANG Bin CUI Guo-bing CHANG Chang-qing WANG Yi-xu ZHANG Hao-yang CHEN Bao-shan DENG Yi-zhen JIANG Zi-de Department of Plant Pathology/state key laboratory for conservation and utilization of subtropical Agro-Bioresources South China Agricultural University Integrative Microbiology Research Centre/Guangdong Province key laboratory of Microbial Signals and Disease Control South China Agricultural University College of Life Science and Technology/state key laboratory for conservation and utilization of subtropical Agro-Bioresources Guangxi University

The basidiomycetous fungus Sporisorium scitamineum causes sugarcane smut that leads to severe economic losses in the major sugarcane growing areas in China,India and Brazil,*** is a conserved pathway in eukaryotes for bulk degradation and cellular recycling,and was shown to be important for fungal cell growth,development,and ***,physiological function of autophagy has not been studied in *** this study,we identified a conserved Atg8 protein,named as SsAtg8 and characterized its *** results showed that autophagy was blocked in the ssatg8Δ mutant,in nitrogen *** ssatg8Δ mutant formed pseudohypha frequently and was hypersensitive to oxidative ***,mating or filamenation was unaffected in the ssatg8Δ mutant in *** we demonstrate that autophagy is dispensable for *** mating/filamentation,while critical for oxidative stress tolerance and proper morphology in sporidial stage.

关键词： Atg8 autophagy fungus Sporisorium scitamineum morphogenesis oxidative stress tolerance

Methylesterification of cell-wall pectin controls the diurnal flower-opening times in rice

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Molecular Plant 2022年第6期15卷 956-972页

作者： Mumei Wang Xiaopei Zhu Guoqing Peng Minglong Liu Shuqing Zhang Minghao Chen Shitang Liao Xiaoying Wei Peng Xu Xiyu Tan Fangping Li Zhichuan Li Li Deng Ziliang Luo Liya Zhu Shuai Zhao Dagang Jiang Jing Li Zhenlan Liu Xianrong Xie Shaokui Wang Aimin Wu Chuxiong Zhuang Hai Zhou Guangdong laboratory for Lingnan Modern agriculture State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresourcesCollege of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China Guangdong laboratory for Lingnan Modern agriculture State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresourcesCollege of AgricultureSouth China Agricultural UniversityGuangzhou 510642China Agronomy Department University of FloridaGainesvilleFL 32610USA state key laboratory for conservation and utilization of subtropical Agro-bioresources College of Life Science and TechnologyGuangxi UniversityNanning 530004China state key laboratory for conservation and utilization of subtropical Agro-bioresources College of Forestry and Landscape ArchitectureSouth China Agricultural UniversityGuangzhou 510642China

Flowers are the core reproductive organ of plants, and flowering is essential for cross-pollination. Diurnal flower-opening time is thus a key trait influencing reproductive isolation, hybrid breeding, and thermostability in plants. However, the molecular mechanisms controlling this trait remain unknown. Here, we report that rice Diurnal Flower Opening Time 1 (DFOT1) modulates pectin methylesterase (PME) activity to regulate pectin methylesterification levels of the lodicule cell walls, which affect lodicule swelling to control diurnal flower-opening time. DFOT1 is specifically expressed in the lodicules, and its expression gradually increases with the approach to flowering but decreases with flowering. Importantly, a knockout of DFOT1 showed earlier diurnal flower opening. We demonstrate that DFOT1 interacts directly with multiple PMEs to promote their activity. Knockout of PME40 also resulted in early diurnal flower opening, whereas overexpression of PME42 delayed diurnal flower opening. Lower PME activity was observed to be associated with higher levels of pectin methylesterification and the softening of cell walls in lodicules, which contribute to the absorption of water by lodicules and cause them to swell, thus promoting early diurnal flower opening. Higher PME activity had the opposite effect. Collectively, our work uncovers a molecular mechanism underlying the regulation of diurnal flower-opening time in rice, which would help reduce the costs of hybrid breeding and improve the heat tolerance of flowering plants by avoiding higher temperatures at anthesis.

关键词： rice hybrid breeding flowering diurnal flower-opening times cell wall pectin methylesterase

Diverse functions of GmNLA1 members in controlling phosphorus homeostasis highlight coordinate response of soybean to nitrogen and phosphorus availability

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The Crop Journal 2023年第4期11卷 1251-1260页

作者： Ming Zhou Yaxue Li Xing Lu Panmin He Cuiyue Liang Jiang Tian Root Biology Center State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresourcesCollege of Natural Resources and EnvironmentSouth China Agricultural UniversityGuangzhou 510642GuangdongChina

Nitrogen(N) and phosphorus(P) are two essential mineral nutrients for plant growth,which are required in relative high amount in *** have evolved a series of strategies for coordinately acquiring and utilizing N and ***,physiological and molecular mechanisms underlying of N and P interactions remain largely unclear in soybean(Glycine max).In this study,interactions of N and P were demonstrated in soybean as reflected by significant increases of phosphate(Pi) concentration in both leaves and roots by N deficiency under Pi sufficient conditions.A total of four nitrogen limitation adaptation(NLA),encoding RING-type E3 ubiquitin ligase were subsequently identified in soybean *** them,transcription of Gm NLA1-1 and Gm NLA1-3 was decreased in soybean by N starvation under Pi sufficient conditions,not for Gm *** of all three Gm NLA1 members was able to increase Pi concentration regardless of the P and N availability in the growth medium,but decrease fresh weight under normal conditions in soybean hairy ***,comparted to changes in control lines at two N levels,N deficiency only resulted in a relatively higher increase of Pi concentration in Gm NLA1-1 or Gm NLA1-3 suppression lines,strongly indicating that Gm NLA1-1 and Gm NLA1-3 might regulate P homeostasis in soybean response to N *** together,our result suggest that redundant and diverse functions present in Gm NLA1 members for soybean coordinate responses to P and N availability,which mediate P homeostasis.

关键词： GmNLA1 N availability P deficiency P homeostasis Soybean