CAJ | 학술논문

　　开花前花粉发育时期是决定作物穗粒数的关键时期。从水分胁迫后导致作物穗粒数降低、降低的可能原因、花粉发育与穗粒数的关系、花粉发育进程的AD值4个方面，阐述了生殖生长早期水分胁迫影响作物穗粒数的研究进展。并根据作物如小麦、谷子等花粉发育特点和生长环境，提出了水分胁迫影响作物穗粒数研究目前存在的问题以及未来研究的重点，主要包括降低作物穗粒数的水分阈值、光合产物在作物源库流中的转化与穗粒数的关系、激素在作物花粉发育中的作用等。为作物的分子设计育种以及水分胁迫降低作物穗粒数的调控机制提供理论基础。
　　개화전화분발육시기시결정작물수립수적관건시기。종수분협박후도치작물수립수강저、강저적가능원인、화분발육여수립수적관계、화분발육진정적AD치4개방면，천술료생식생장조기수분협박영향작물수립수적연구진전。병근거작물여소맥、곡자등화분발육특점화생장배경，제출료수분협박영향작물수립수연구목전존재적문제이급미래연구적중점，주요포괄강저작물수립수적수분역치、광합산물재작물원고류중적전화여수립수적관계、격소재작물화분발육중적작용등。위작물적분자설계육충이급수분협박강저작물수립수적조공궤제제공이론기출。
Pollen development stage of pre-anthesis is critical important stage for grain number of crops.This paper described the current research progress of water stress affect grain number of crops during early reproductive stage from four aspects respectively, grain number reducing, causes of reducing grain number, relation between pollen development and grain number, AD value of pollen development process.Based on the characteristics of pollen development and growing environment of crops, such as wheat, millet and other crops, this paper put forward the problems of improving grain number with water stress during reproductive stage and the key to research on crops grain number in the future.It mainly included water threshold reduced grain number of crops during reproductive stage, photosynthate allocation in the sink,source and flow, relation between photosynthate and grain number of crops and plant hormone regulation in pollen development.It will provide the theory basis for molecular design breeding in crops and regulatory mechanism of water stress leading to reduced grain number of crops.