Effects of Different Vermicompost Rates on Growth,2-Acetyl-1-Pyrroline,Photosynthesis and Antioxidant Responses of Fragrant Rice(Oryza sativa L.)Seedling  

作　　者：Shaoyi Ruan Haowen Luo Xiaoyan Zeng Runhao Wen Feida Wu Xiangru Tang 

机构地区：[1]State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources,College of Agriculture,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 Fragrant Rice,Guangzhou,510642,China

出　　处：《Phyton-International Journal of Experimental Botany》2021年第4期1273-1283,共11页国际实验植物学杂志（英文）

基　　金：supported by National Natural Science Foundation of China(31971843);Technology System of Modern Agricultural Industry in Guangdong(2019KJ105);XT received the grant.

摘　　要：Vermicompost is an organic fertilizer contains multiple nutrient elements.However,the application of vermicompost in fragrant rice production is rarely reported.In order to study the effects of vermicompost application on fragrant rice(Oryza sativa L.)seedling performances,present study was conducted with two fragrant rice cultivars and four vermicompost rate treatments(0(CK),2.5(Wo1),5.0(Wo2)and 10.0(Wo3)g kg−1).The results showed that vermicompost treatments significantly increased dry weight of fragrant rice seedling by 8.31–32.56%compared with CK.21.10–59.13%higher net photosynthetic rates and 10.66–59.16%higher chlorophyll contents(chlorophyll a,chlorophyll b and total chlorophyll)were recorded in vermicompost treatments than CK.Application of vermicompost also significantly increased 2-acetyl-1-pyrroline(2-AP,the key compound of fragrant rice aroma)content and reduced the transcript level of gene BADH2 which related to 2-AP biosynthesis in fragrant rice seedling.Moreover,compared with CK,vermicompost treatments enhanced activities of superoxide dismutase,peroxidase,catalase by 24.42–28.66%,24.98–25.73%and 22.45–23.57%,respectively.11.54–40.53%lower malonaldehyde contents were recorded in vermicompost treatments in related to CK.In conclusion,vermicompost improved growth,increased 2-AP content and might enhance stress resistant of fragrant rice seedling.

关 键 词：2-acetyl-1-pyrroline fragrant rice gene expression PHOTOSYNTHESIS VERMICOMPOST 

分 类 号：S51[农业科学—作物学]