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Two ABCI family transporters,OsABCI15 and OsABCI16,are involved in grain-filling in rice

Journal of Genetics and Genomics 2024年第5期51卷 492-506页

作者： Bin Ma Xiubiao Cao Xiaoyuan Li Zhong Bian Qi-Qi Zhang Zijun Fang Jiyun Liu Qun Li Qiaoquan Liu Lin Zhang Zuhua He Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education/Jiangsu Key Laboratory of Crop Genetics and Physiology Agricultural College of Yangzhou UniversityYangzhouJiangsu 225009China Jiangsu Co-Innovation Center for Modern Production Technology of grain Crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhouJiangsu 225009China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology&EcologyChinese Academy of SciencesShanghai 200032China Institute of Biotechnology Hangzhou Academy of Agricultural SciencesHangzhouZhejiang 310024China Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education Yangzhou UniversityYangzhouJiangsu 225009China

Seed development is critical for plant reproduction and crop yield,with panicle seed-setting rate,grain-filling,and grain weight being key seed characteristics for yield ***,few genes are known to regulate grain ***,we identify two adenosine triphosphate(ATP)-binding cassette(ABC)I-type transporter genes,OsABCI15 and OsABCI16,involved in rice *** genes are highly expressed in developing seeds,and their proteins are localized to the plasma membrane and ***,knockout of OsABCI15 and OsABCI16 results in a significant reduction in seed-setting rate,caused predominantly by the severe empty pericarp phenotype,which differs from the previously reported low seed-setting phenotype resulting from failed *** analysis indicates that OsABCI15 and OsABCI16 participate in ion homeostasis and likely export ions between filial tissues and maternal tissues during grain ***,overexpression of OsABCI15 and OsABCI16 enhances the seed-setting rate and grain yield in transgenic plants and decreases ion accumulation in brown ***,the OsABCI15/16 orthologues in maize exhibit a similar role in kernel development,as demonstrated by their disruption in transgenic ***,ourﬁndings reveal the important roles of two ABC transporters in cereal grain filling,highlighting their value in crop yield improvement.

关键词： ABC transporters Rice grain filling Ion homeostasis grain yield

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grain-filling strategies of wheat of contrasting grain sizes under various planting patterns and irrigation levels

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The Crop Journal 2024年第3期12卷 897-906页

作者： Zimeng Liang Jingyi Feng Jiayu Li Yangyang Tang Tiankang He Vinay Nangia Yang Liu College of Agronomy Northwest A&F UniversityYangling 712100ShaanxiChina International Center for Agricultural Research in the Dry Areas Rabat 999055Morocco

In a study comparing grain filling and yield in a large-and a small-grain-size wheat cultivar under two planting patterns and two irrigation regimes,plastic-covered ridge and furrow planting with sprinkler irrigation increased grain filling and yield in both *** largest contributors to grain yield were an extended active grain-filling period in Shuangda 1 and an increased mean grain-filling rate in XN538.

关键词： Plastic-covered ridge and furrow cultivation Sprinkler irrigation Wheat grain size grain filling

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Nitrogen application affects maize grain filling by regulating grain water relations

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Journal of Integrative Agriculture 2022年第4期21卷 977-994页

作者： WU Ya-wei ZHAO Bo LI Xiao-long LIU Qin-lin FENG Dong-ju LAN Tian-qiong KONG Fan-lei LI Qiang YUAN Ji-chao College of Agriculture Sichuan Agricultural UniversityChengdu 611130P.R.China Chongqing Key Laboratory of Economic Plant Biotechnology/Collaborative Innovation Center of Special Plant Industry in Chongqing/Institute of Special Plants Chongqing University of Arts and SciencesChongqing 402160P.R.China Crop Ecophysiology and Cultivation Key Laboratory of Sichuan Province Chengdu 611130P.R.China

grain water relations play an important role in grain filling in maize. The study aimed to gain a clear understanding of the changes in grain dry weight and water relations in maize grains by using hybrids with contrasting nitrogen efficiencies under differing nitrogen levels. The objectives were: 1) to understand the changes in dry matter and percent moisture content(MC) during grain development in response to different nitrogen application rates and 2) to determine whether nitrogen application affects grain filling by regulating grain water relations. Two maize hybrids, high N-efficient Zhenghong 311(ZH311) and low N-efficient Xianyu 508(XY508), were grown in the field under four levels of N fertilizer: 0, 150, 300, and 450 kg N ha;during three growing seasons. Dry weight, percent MC and water content(WC) of basal-middle and apical grains were investigated. The difference in the maximum WC and filling duration of basal-middle and apical grains in maize ears resulted in a significant difference in final grain weight. grain position markedly influenced grain drying down;specifically, the drying down rate of apical grains was faster than that of basal-middle grains. Genotype and grain position both influenced the impact of nitrogen application rate on grain filling and drying down. Nitrogen rate determined the maximum grain WC and percent MC loss rate in the middle and the late grain-filling stages, thus affecting final grain weight. The use of high N-efficient hybrids, combined with the reduction of nitrogen application rate, can coordinate basal-middle and apical grain drying down to ensure yield. This management strategy could lead to a win-win situation in which the maximum maize yield, efficient mechanical harvest and environmental safety are all achieved.

关键词： maize grain filling grain drying down nitrogen maximum water content

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Identification of microRNAs regulating grain filling of rice inferior spikelets in response to moderate soil drying post-anthesis

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The Crop Journal 2022年第4期10卷 962-971页

作者： Zhenning Teng Yinke Chen Youqing Yuan Yaqiong Peng Yake Yi Huihui Yu Zhenxie Yi Jianchang Yang Yan Peng Meijuan Duan Jianhua Zhang Nenghui Ye College of Agriculture Hunan Agricultural UniversityChangsha 410128HunanChina Hunan Provincial Key Laboratory of Rice Stress Biology Hunan Agricultural UniversityChangsha 410128HunanChina Changjun High School of Changsha Changsha 410128HunanChina Key Laboratory of Crop Genetics and Physiology of Jiangsu Province Yangzhou UniversityYangzhou 225009JiangsuChina Department of Biology Hong Kong Baptist UniversityKowloon 999077Hong KongChina School of Life Sciences and State Key Laboratory of Agrobiotechnology the Chinese University of Hong KongShatin 999077Hong KongChina

The grain filling of inferior spikelets is much less complete than that of superior spikelets in rice cultivars with large panicles and numerous spikelets and is promoted by moderate soil drying(MD)post-anthesis.A growing body of evidence has shown that microRNAs function in regulating grain ***,little is known about the mechanism of microRNA control of grain filling of inferior spikelets in response to *** this study,grain filling of inferior spikelets was promoted by MD treatment in ***-RNA profiling at the most active grain-filling stage was conducted in inferior spikelets under control(CK)and MD *** 521 known and 128 novel miRNAs,38 known and 9 novel miRNAs were differentially expressed between the CK and MD *** genes of differentially expressed miRNAs were involved in multiple developmental and signaling pathways associated with catalytic activity,carbohydrate metabolism,and other *** miR1861 and miR397 were upregulated by MD,leading to a decrease in OsSBDCP1 and OsLAC,two negative regulators of SSIIIa activity and BR signaling,*** contrast,miR1432 abundance was reduced by MD,resulting in upregulation of OsACOT and thus an elevated content of both ABA and *** results suggest that both starch synthesis and phytohormone biosynthesis are regulated by differentially expressed miRNAs in inferior spikelets in response to MD *** results suggest the molecular mechanisms by which miRNAs regulate grain filling in inferior spikelets of rice under moderate soil drying,providing potential application in agriculture to increase rice yields by genetic approaches.

关键词： Moderate soil drying grain filling Inferior spikelet MicroRNA Rice

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Understanding the regulation of cereal grain filling:The way forward

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Journal of Integrative Plant Biology 2023年第2期65卷 526-547页

作者： Bin Ma Lin Zhang Zuhua He National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology&EcologyChinese Academy of SciencesShanghai 200032China Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education Yangzhou UniversityYangzhou 225009China Jiangsu Co-Innovation Center for Modern Production Technology of grain Crops Yangzhou UniversityYangzhou 225009China

During grain filling,starch and other nutrients accumulate in the endosperm;this directly determines grain yield and grain quality in crops such as rice(Oryza sativa),maize(Zea mays),and wheat(Triticum aestivum).grain filling is a complex trait affected by both intrinsic and environmental factors,making it difficult to explore the underlying genetics,molecular regulation,and the application of these genes for *** the development of powerful genetic and molecular techniques,much has been learned about the genes and molecular networks related to grain filling over the past *** this review,we highlight the key factors affecting grain filling,including both biological and abiotic *** then summarize the key genes controlling grain filling and their roles in this event,including regulators of sugar translocation and starch biosynthesis,phytohormone-related regulators,and other ***,we discuss how the current knowledge of valuable grain filling genes could be integrated with strategies for breeding cereal varieties with improved grain yield and quality.

关键词： cereals grain filling grain yield phytohormone regulation starch synthesis sugar translocation

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The Endosperm-Specific Expression of YUCCA Genes Enhances Rice grain filling

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Phyton-International Journal of Experimental Botany 2022年第12期91卷 2633-2648页

作者： Huijun Jiang Kaien Zhai Xiaofan Ye Tianwei Hu Jieming Jiang Xiaoqiu Dong Weihuai Pan Jianwei Pan Jianxin Shou College of Life Sciences Shaoxing UniversityShaoxing312000China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua321004China School of Life Sciences Lanzhou UniversityLanzhou730000China School of Life Science South China Normal UniversityGuangzhou510631China

grain filling is a crucial process that affects yield in rice(Oryza sativa L.).Auxin biosynthesis and signaling are closely related to rice yield;therefore,it is important to understand the effects of auxin biosynthesis on rice grain filling to improve crop *** this study,we used physiological and molecular strategies to identify the roles of auxin in rice grain *** application of auxin(IAA)or auxin analogues(2,4-D)to young spikelets and flag leaves improved the seed-setting rate and yield per ***,real-time quantitative PCR assays confirmed that nine members of the OsYUCCA family of auxin biosynthetic genes were upregulated during grain filling,implication that auxin biosynthesis plays a major role in grain *** specific expression of either Arabidopsis AtYUCCA1 or OsYUCCA2 in the endosperm or leaves resulted in increased expression of OsIAA genes and auxin content of seeds,as well as increased grain filling and seed-setting *** result establishes that the auxin content in grains and leaves is important for grain *** findings further highlight the potential applications for improving rice yield by elevating targeted gene expression in specific tissues.

关键词： Auxin content grain filling IAA biosynthesis rice seed-setting rate YUCCA genes

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Combined effect of shading time and nitrogen level on grain filling and grain quality in japonica super rice

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Journal of Integrative Agriculture 2018年第11期17卷 2405-2417页

作者： WEI Hai-yan ZHU Ying QIU Shi HAN Chao HU Lei XU Dong ZHOU Nian-bing XING Zhi-peng HU Ya-jie CUI Pei-yuan DAI Qi-gen ZHANG Hong-cheng Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Co-Innovation Center for Modern Production Technology of grain Crops/Agricultural College Yangzhou University

There is limited information about the combined effect of shading time and nitrogen （N） on grain filling and quality of rice. Therefore, two japonica super rice cultivars, Nanjing 44 and Ningjing 3, were used to study the effect of shading time and N level on the characteristics of rice panicle and grain filling as well as the corresponding yield and quality. At a low N level （150 kg N ha^-1, 150N）, grain yield decreased （by 21.07-26.07%） under the treatment of 20 days of shading before heading （BH） compared with the no shading （NS） treatment. These decreases occurred because of shortened panicle length, decreased number of primary and secondary branches, as well as the grain number and weight per panicle. At 150N, in the treatment of 20 days of shading after heading （AH）, grain yield also decreased （by 9.46-10.60%） due to the lower grain weight per panicle. The interaction of shading and N level had a significant effect on the number of primary and secondary branches. A high level of N （300 kg N ha^-1, 300N） could offset the negative effect of shading on the number of secondary branches and grain weight per panicle, and consequently increased the grain yield in both shading treatments. In superior grains, compared with 150N NS, the time to reach 99% of the grain weight （T99） was shortened by 1.6 to 1.7 days, and the grain weight was decreased by 4.18-5.91% in 150N BH. In 150N AH, the grain weight was 13.39-13.92% lower than that in 150N NS due to the slow mean and the maximum grain-filling rate （GRmean and GRmax）. In inferior grains, grain weight and GRmean had a tendency of 150N NS〉150N BH〉150N AH. Under shaded conditions, 300N decreased the grain weight due to lower GReen both in superior and inferior grains. Compared with 150N NS, the milling and appearance qualities as well as eating and cooking quality were all decreased in 150N BH and 150N AH. Shading with the high level of 300N improved the milling quality and decreased the number of chalky rice kernels, but

关键词： shading time N levels grain filling rice quality japonica super rice

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Effects of nitrogen fertilizer and chemical regulation on spring maize lodging characteristics, grain filling and yield formation under high planting density in Heilongjiang Province, China

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Journal of Integrative Agriculture 2021年第2期20卷 511-526页

作者： LIU Xiao-ming GU Wan-rong LI Cong-feng LI Jing WEI Shi College of Agronomy Northeast Agricultural UniversityHarbin 150030P.R.China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081P.R.China

Now,lodging is a major constraint factor contributing to yield loss of maize (Zea mays L.) under high planting *** regulation and nitrogen fertilizer could effectively coordinate the relationship between stem lodging and maize yield,which significantly reduce lodging and improve the grain *** purpose of this study was to explore the effects of chemical regulation and different nitrogen application rates on lodging characteristics,grain filling and yield of maize under high *** this,we established a field study during 2017 and 2018 growing seasons,with three nitrogen levels of N100 (100 kg ha^(–1)),N200 (200 kg ha^(–1)) and N300 (300 kg ha^(–1)) at high planting density (90 000 plants ha^(–1)),and applied plant growth regulator (Yuhuangjin,the mixture of 3% DTA-6 and 27% ethephon) at the 7th *** results showed that chemical control increased the activities of phenylalanine ammonia-lyase (PAL),tyrosine ammonia-lyase (TAL),4-coumarate:Co A ligase (4CL),and cinnamyl alcohol dehydrogenase (CAD),and increased the lignin,cellulose and hemicellulose contents at the bottom of the 3rd internode,which significantly reduced the lodging *** lignin-related enzyme activities,lignin,cellulose and hemicellulose contents decreased with the increase of nitrogen fertilizer,which significantly increased the lodging *** 200 kg ha^(–1) nitrogen application and chemical control increased the number,diameter,angle,volume,and dry weight of brace *** 200 kg ha^(–1) nitrogen application and chemical control significantly increased the activities of ADP-glucose pyrophosphorylase (AGPase),soluble starch synthase (SSS) and starch branching enzyme(SBE),which promoted the starch accumulation in ***,improved the maximum grain filling rate (V_(max)) and mean grain filling rate (V_(m)),which promoted the grain filling process,significantly increased grain weight and grain number per ear,thus increased the final yield.

关键词： lodging resistance grain filling starch synthesis yield maize

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Effects of Early- and Late-Sowing on Starch Accumulation and Associated Enzyme Activities During grain filling Stage in Rice

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Rice science 2021年第2期28卷 191-199页

作者： WANG Wenting CUI Wenpei XU Ke GAO Hui WEI Haiyan ZHANG Hongcheng Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology Agricultural College of Yangzhou UniversityYangzhou 225009China Jiangsu Co-Innovation Center for Modern Production Technology of grain Crops Yangzhou UniversityYangzhou 225009China

The environmental temperature occurring during the grain filling stage is an important factoraffecting starch synthesis and accumulation in rice. We investigated starch accumulation, amylaseactivity and starch granule size distribution in two low-amylose japonica rice varieties, Nanjing 9108 andFujing 1606, grown in the field at different filling temperatures by manipulating sowing date. The two ricevarieties exhibited similar performances between two sowing dates. Total starch, amylose andamylopectin contents were lower at the early-filling stage of T1 treatment (Early-sowing) compared withthose at the same stage in T2 treatment (Late-sowing). In contrast, at the late-filling stage, when fieldtemperatures were generally decreasing, total starch and amylopectin contents in T1 were highercompared to those in T2. The ideal temperature for strong activity of ADP-glucose pyrophosphorylaseand soluble starch synthase was about 22℃. A higher temperature from the heading to maturity stagesin T1 increased the activities of starch branching enzyme and suppressed the activities of granule boundstarch synthetase and starch debranching enzyme. We found that rice produced larger-sized starchgranules under the T1 treatment. These results suggested that due to the early-sowing date, the hightemperature (30℃) occurring at the early-filling stage hindered starch synthesis and accumulation,however, the lower temperatures (22 ℃) at the late-filling stage allowed starch synthesis and accumulationto return to normal levels.

关键词： rice grain filling starch accumulation starch synthesis enzyme starch granule size temperature

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Top-grain filling characteristics at an early stage of maize(Zea mays L.) with different nitrogen use efficiencies

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Journal of Integrative Agriculture 2017年第3期16卷 626-639页

作者： SHEN Li-xia HUANG Yan-kai LI Ting College of Water Conservancy and Engineering Taiyuan University of Technology Taiyuan 030024 P.R. China

Maize genotypes vary significantly in their nitrogen use efficiencies（NUEs）.Better understanding of early grain filling characteristics of maize is important,especially for maize with different *** objectives of this research were（i）to investigate the difference in apical kernel development of maize with different NUEs,（ii）to determine the reaction of apical kernel development to N application levels,and（iii）to evaluate the relationship between apical kernel development and grain yield（GY）for different genotypes of *** maize hybrid varieties with different NUEs were cultivated in a field with different levels of N fertilizer arranged during two growing *** fresh weight（KFW）,volume（KV）and dry weight（KDW）of apical kernel were evaluated at an early grain filling *** characteristics,GY and its components were determined at maturity *** kernel of the high N and high efficiency（HN-HE）type（under low N,the yield is lower,and under higher N,the yield is higher）developed better under high N（N210 and N240,pure N of 210 and 240 kg ha^–1）than at low N（N120 and N140,pure N of 120 and 140 kg ha^–1）.The low N and high efficiency（LN-HE）type（under low N,the yield is higher,while under higher N,the yield is not significantly higher）developed better under low N than at high *** double high efficiency（D-HE）type（for both low and high N,the yield is higher）performed well under both high and low *** kernel reacted differently to the N *** kernel developed well at an early grain filling stage and resulted in a higher kernel number（KN）,kernel weight（KW）and GY with better ear characteristics at maturity.

关键词： Zea mays L. grain filling nitrogen use efficiency kernel development

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