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The effect of elevating temperature on the growth and development of reproductive organs and yield of summer maize

Journal of Integrative Agriculture 2021年第7期20卷 1783-1795页

作者： SHAO Rui-xin YU Kang-ke LI Hong-wei JIA Shuang-jie YANG Qing-hua ZHAO Xia ZHAO Ya-li LIU Tian-xue Collaborative Center Innovation of Henan Food Crops/National Key Laboratory of Wheat and Maize Crop Science/College of Agronomy Henan Agricultural UniversityZhengzhou 450046P.R.China Institute of Grain Crops Henan Academy of Agricultural SciencesZhengzhou 450002P.R.China

Compared to other crops,maize production demands relatively high ***,temperatures exceeding 35℃lead to adverse effects on maize *** temperatures(≥35℃)are consistently experienced by summer maize during its reproductive growth stage in the North China Plain,which is likely to cause irreversible crop *** study investigated the effects of elevating temperature(ET)treatment on the yield component of summer maize,beginning at the 9th unfolding leaf stage and ending at the tasseling *** demonstrated that continuous ET led to a decrease in the elongation rate and activity of silks and an elongated interval between anthesis and silking stages,and eventually decreased grain number at ear tip and reduced *** continuous ET before tasseling damaged the anther structure,reduced pollen activity,delayed the start of the pollen shedding stage,and shortened the pollen shedding time,it was inferred,based on phenotypical and physiological traits,that continuous ET after the 9th unfolding leaf stage influenced ears and therefore may have more significant ***,when maize plants were exposed to ET treatment in the ear reproductive development stage,the growth of ears and tassels was blocked,which increased the occurrence of barren ear tips and led to large yield losses.

关键词： summer maize North China Plain elevating temperatures reproductive stage barren ear tip yield

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