Epoxiconazole Improved Photosynthesis,Yield Formation,Grain Quality and 2-Acetyl-1-Pyrroline Biosynthesis of Fragrant Rice  

作　　者：LUO Haowen HE Longxin DU Bin PAN Shenggang MO Zhaowen YANG Shuying ZOU Yingbin TANG Xiangru 

机构地区：[1]State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources,South China Agricultural University,Guangzhou 510642,China [2]Scientific Observing and Experimental Station of Crop Cultivation in South China,Ministry of Agriculture and Rural Affairs,Guangzhou 510642,China [3]Guangzhou Key Laboratory for Science and Technology of Aromatic Rice,Guangzhou 510642,China [4]College of Agronomy,Hunan Agricultural University,Changsha 410128,China

出　　处：《Rice science》2022年第2期189-196,共8页水稻科学（英文版）

基　　金：This study was supported by the National Natural Science Foundation of China(Grant No.31971843);the Technology System of Modern Agricultural Industry in Guangdong(Grant No.2020KJ105);Guangzhou Science and Technology Project in China(Grant No.202103000075).

摘　　要：Epoxiconazole is a triazole compound.However,the effects of epoxiconazole on crop productivity and quality were rarely reported.In this study,we investigated the effects of epoxiconazole application on yield formation,grain quality attributes,and 2-acetyl-1-pyrroline(2-AP)content in fragrant rice.A three-year field experiment was carried out with a fragrant rice variety,Meixiangzhan 2.At the heading stage,0,0.02,0.04,0.08,0.16 and 0.32 g/L epoxiconazole solutions were foliar applied to fragrant rice plants,respectively.The results showed that epoxiconazole application significantly increased grain yield,seed-setting rate and 1000-grain weight.Chlorophyll content and net photosynthetic rate of fragrant rice during the grain-filling stage significantly increased due to epoxiconazole application.Foliar application of epoxiconazole at 0.08 g/L increased grain protein content and decreased both chalky rice rate and chalkiness area ratio of fragrant rice.Epoxiconazole also substantially increased grain 2-AP content by inducing the regulation in contents of related synthetic precursors,including proline,pyrroline-5-carboxylic acid,Δ1-pyrroline and methylglyoxal.Overall,foliar application of epoxiconazole could be used for the improvement in grain yield,grain quality and 2-AP content in fragrant rice production when applied concentration at 0.08-0.32 g/L.Our findings provided the new roles of epoxiconazole in crop production.

关 键 词：EPOXICONAZOLE fragrant rice 2-acetyl-1-pyrroline yield formation grain quality 

分 类 号：S511[农业科学—作物学]