Embryo-Endosperm Interaction and Its Agronomic Relevance to Rice Quality

被引:52
作者
An, Lu [1 ]
Tao, Yang [1 ]
Chen, Hao [1 ]
He, Mingjie [1 ]
Xiao, Feng [1 ]
Li, Ganghua [1 ]
Ding, Yanfeng [1 ,2 ]
Liu, Zhenghui [1 ,2 ]
机构
[1] Nanjing Agr Univ, Coll Agr, Nanjing, Peoples R China
[2] Nanjing Agr Univ, Collaborat Innovat Ctr Modern Crop Prod, Nanjing, Peoples R China
基金
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词
rice; seed development; embryo; endosperm; interaction; grain quality; SEED-DEVELOPMENT; GRAIN DEVELOPMENT; STARCH SYNTHESIS; DYNAMIC CHANGES; GENE; ENCODES; PROTEIN; MUTANT; ACID; ACCUMULATION;
D O I
10.3389/fpls.2020.587641
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Embryo-endosperm interaction is the dominant process controlling grain filling, thus being crucial for yield and quality formation of the three most important cereals worldwide, rice, wheat, and maize. Fundamental science of functional genomics has uncovered several key genetic programs for embryo and endosperm development, but the interaction or communication between the two tissues is largely elusive. Further, the significance of this interaction for grain filling remains open. This review starts with the morphological and developmental aspects of rice grain, providing a spatial and temporal context. Then, it offers a comprehensive and integrative view of this intercompartmental interaction, focusing on (i) apoplastic nutrient flow from endosperm to the developing embryo, (ii) dependence of embryo development on endosperm, (iii) regulation of endosperm development by embryo, and (iv) bidirectional dialogues between embryo and endosperm. From perspective of embryo-endosperm interaction, the mechanisms underlying the complex quality traits are explored, with grain chalkiness as an example. The review ends with three open questions with scientific and agronomic importance that should be addressed in the future. Notably, current knowledge and future prospects of this hot research topic are reviewed from a viewpoint of crop physiology, which should be helpful for bridging the knowledge gap between the fundamental plant sciences and the practical technologies.
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页数:11
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