Impact of Rapeseed Sequential Follow Paddy Crop on Its 2-Acetyl-1-pyrroline Biosynthesis and Economic Yield under the Double-Cropping System
Wentao Yi,
Haowen Luo,
Mingliang Zhang,
Zhigui Sun,
Qichang Gu,
Sicheng Deng,
Yizhu Wu,
Yugang Yan,
Zisheng Chen,
Jianying Qi,
Dongfeng Liu,
Xiangru Tang
Affiliations
Wentao Yi
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Haowen Luo
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Mingliang Zhang
Shenzhen Agricultural Science and Technology Promotion Center, Nanshan, Shenzhen 518000, China
Zhigui Sun
Shenzhen Agricultural Science and Technology Promotion Center, Nanshan, Shenzhen 518000, China
Qichang Gu
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Sicheng Deng
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Yizhu Wu
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Yugang Yan
College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Zisheng Chen
Shenzhen Agricultural Science and Technology Promotion Center, Nanshan, Shenzhen 518000, China
Jianying Qi
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Dongfeng Liu
Shenzhen Agricultural Science and Technology Promotion Center, Nanshan, Shenzhen 518000, China
Xiangru Tang
State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
Rapeseed–rice rotation is a cropping system that improves the land-use rate. The present study conducted a field experiment with winter planting of rapeseed as treatment (WR) and winter fallow as control (CK) to investigate the effects of winter planting of rapeseed on growth, yield formation, and 2-acetyl-1-pyrroline (2-AP) biosynthesis of fragrant rice in the two subsequent cropping seasons. The results show that WR treatment improved alkali-hydro nitrogen and rapidly available phosphorus contents in soil. Compared with CK, WR treatment significantly increased grain yield and effective panicle number per plant by 21.16–27.26% and 7.33–21.24%, respectively. Higher net photosynthetic rate, leaf area index, and dry matter accumulation of fragrant rice plants were recorded in WR treatment and CK. Furthermore, compared with CK, WR treatment significantly increased grain 2-AP content, which could be explained by increased content of pyrroline-5-carboxylic acid, methylglyoxal, 1-pyrroline, and enhanced activity of proline dehydrogenase. In addition, future studies should be conducted at a molecular level to reveal the regulation mechanism in 2-AP biosynthesis of fragrant rice under conditions of winter planting of rapeseed.
