Grain-Filling Characteristics and Yield Formation of Rice at Saline Field
Huanhe Wei,
Boyuan Zuo,
Jizou Zhu,
Weiyi Ma,
Xiang Zhang,
Lulu Wang,
Xiaoyu Geng,
Yinglong Chen,
Tianyao Meng,
Qigen Dai
Affiliations
Huanhe Wei
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Boyuan Zuo
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Jizou Zhu
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Weiyi Ma
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Xiang Zhang
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Lulu Wang
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Xiaoyu Geng
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Yinglong Chen
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
Tianyao Meng
Institutes of Agricultural Science and Technology Development (Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China), Yangzhou University, Yangzhou 225009, China
Qigen Dai
Jiangsu Key Laboratory of Crop Cultivation and Physiology, Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Key Laboratory of Saline-Alkali Soil Reclamation and Utilization in Coastal Areas, East China Branch of National Center of Technology Innovation for Saline-Alkali Tolerant Rice, Research Institute of Rice Industrial Engineering Technology, Yangzhou University, Yangzhou 225009, China
It is of great interest to utilize saline fields to promote rice production in China. It has still not been established how salinity stress affects grain-filling characteristics and the relationships with yield formation of rice in a saline field. This experiment was conducted with Ningjing 7 (salinity-tolerant rice variety) and Wuyunjing 30 (salinity-susceptible rice variety) in a non-saline field and a high-saline field in 2021 and 2022. The grain yields of Ningjing 7 and Wuyunjing 30 in a high-saline field were 37.7% and 49.8% lower (p p p p < 0.05) than those in a non-saline field, and the reductions were more pronounced for Wuyunjing 30. The maximum grain-filling rate and mean grain-filling rate were decreased, while the time to achieve the maximum grain-filling rate was increased in a high-saline field compared to a non-saline field, especially for Wuyunjing 30. The mean grain-filling rate and grain-filling amount in superior and inferior grains during the early, middle, and late stages were lower in a high-saline field than in a non-saline field. For Ningjing 7 and Wuyunjing 30, the reductions in the grain-filling amount in the inferior grains during the early, middle, and late stages in a high-saline field were greater than those in superior grains. Our results suggest that salinity stress inhibited the grain-filling rate, reduced the total starch content and affected key enzyme activities, which led to the poor sink-filling efficiency and yield performance of rice in a saline field, especially for the salinity-susceptible variety.
