Rice-duck co-culture benefits grain 2-acetyl-1-pyrroline accumulation and quality and yield enhancement of fragrant rice

作     者：Meijuan Li Ronghua Li Shiwei Liu Jia'en Zhang Hao Luo Shuqing Qiu 

作者机构：College of Natural Resources and Environment South China Agricultural University Guangzhou 510642 Guangdong China Guangdong Engineering Technology Research Centre of Modern Eco-agriculture and Circular Agriculture Guangzhou 510642 Guangdong China Key Laboratory of Agro-Environment in the Tropics Ministry of Agriculture Guangzhou 510642 Guangdong China 

出 版 物：《The Crop Journal》 (作物学报（英文版）)

年 卷 期：2019年第7卷第4期

页      面：419-430页

核心收录：

学科分类：09[农学] 

基　　金：supported by the Science and Technology Project of Guangdong Province (2015B090903077, 2016A020210094, 2017A090905030), China the Science and Technology Project of Guangzhou (201604020062), China the Innovation Team Construction Project of Modern Agricultural Industry Technology System of Guangdong Province (2016LM1100), China the Overseas Joint Doctoral Training Program of South China Agricultural University (2018LHPY010), China 

主　　题：Rice-duck co-culture 2-AP Proline Yield Grain quality Fragrant rice 

摘      要：Rice-duck co-culture is an integrated farming technology that benefits rice production, grain quality, and ecological sustainability in paddy fields. However, little is known about the effects of rice-duck co-culture on enzyme activity involved in the biosynthesis of 2-acetyl-1-pyrroline (2-AP), the volatile that gives fragrant rice its distinctive and sought-after aroma. The present study aimed to examine the influence of rice-duck co-culture on the photosynthesis, yield, grain quality, rice aroma, and the enzymes involved in 2-acetyl-1-pyrroline biosynthesis in the cultivar Meixiangzhan 2 during the early and late rice growing seasons of 2016 in Guangzhou, China. We compared the rice grown in paddy fields with and without ducks. We found that rice-duck co-culture not only improved the yield and quality of fragrant rice grain, but also promoted the precursors of 2-AP biosynthesis formation and 2-AP accumulation in the grain. Grain 2-AP content in rice-duck co-culture was noticeably increased with 9.60% and 20.81% in early and late seasons, respectively. Proline and pyrroline-5-carboxylic acid (P5C) (precursors of 2-AP biosynthesis) and the activity of enzymes such as proline dehydrogenase (ProDH), ornithine aminotransferase (OAT) and Δ1 pyrroline-5-carboxylic acid synthetase (P5CS) were all improved by 10.15%–12.99%, 32.91%–47.75%, 17.81%–26.71%, 6.25%–21.78%, and 10.58%–38.87% under rice-duck co-culture in both seasons, respectively. Overall, our results suggest that rice-duck co-culture is an environmentally-friendly and sustainable approach to improving rice aroma and grain quality of fragrant rice.