Effects of Paclobutrazol Seed Soaking on Non-Structural Carbohydrate and Grain Enrichment in Direct-Seeded Rice
作者机构：Agronomy CollegeJilin Agricultural UniversityChangchun130118China Jilin Academy of Agricultural SciencesChangchun130118China
出 版 物：《Phyton-International Journal of Experimental Botany》 (国际实验植物学杂志(英文))
年 卷 期：2025年第94卷第1期
页 面：269-279页
核心收录：
基 金：National Key Research and Development Project of China(2022yfd1500501) Jilin Province Science and Technology Department Outstanding Young Talent Fund Project(20230508001RC)
主 题：Paclobutrazol direct-seeded rice soluble sugar starch yield
摘 要：The yield of direct-seeded rice(DSR)was constrained by inadequate grain *** studies have indicated that paclobutrazol application plays a significant role in enhancing crop agronomic traits and increasing *** study aimed to examine the effects of paclobutrazol seed soaking(PSS)on non-structural carbohydrate accumulation and grain enrichment in DSR,potentially providing a theoretical foundation for achieving high-yield DSR *** experiment utilized two rice varieties,Jiyujing(JYJ)and Jijing305(JJ305),with seeds soaked in paclobutrazol concentrations of 0 mg L^(−1) and 100 mg L^(−1).PSS demonstrated increased chlorophyll content,net photosynthetic rate,and leaf area,as well as an extended photosynthetic function period during the filling *** also elevated soluble sugar and starch contents in the flag leaf(during the filling stage)and stem sheath(after heading),decreased starch content in the top panicle while increasing it in the middle and lower panicle during the filling stage,and enhanced spikelet per unit area and seed setting rate,thereby improving DSR *** conclusion,PSS enhanced the photosynthetic capacity of DSR during the filling stage,coordinated the filling process of superior and inferior grains,maintained source-sink balance,and facilitated stable and orderly filling,ultimately resulting in improved yield.
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