Regulation of Regeneration Rate to Enhance Ratoon Rice Production  

作　　者：NIE Lixiao GUO Xiayu WANG Weiqin QI Yucheng AI Zhiyong HE Aibin 

机构地区：[1]Hunan Hybrid Rice Research Center,Changsha 410125,China [2]National Innovation Center of Saline-Alkali Tolerant Rice in Sanya,Sanya 572000,China [3]Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource,College of Tropical Crops,Hainan University,Haikou 570228,China [4]College of Agronomy,Hunan Agricultural University,Changsha 410000,China

出　　处：《Rice science》2025年第2期177-192,共16页水稻科学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant No.32301934);the Hunan Provincial Natural Science Foundation,China(Grant No.2023JJ40470);Ten Key Technological Projects in Hunan Province Project,China(Grant No.2025QK1006);Changsha Science and Technology Program Project,China(Grant No.kq2404003).

摘　　要：Ratoon rice(Oryza sativa L.)is a sustainable planting model,and its planting area has been increasing year by year.However,there is a lack of literature reviewing the measures and mechanisms to regulate the regeneration rate,as well as the challenges in the production of ratoon rice.This study explores the effects of different varieties,climatic conditions(light and temperature),and cultivation measures(fertilizer management,cropping system,harvest method,water management,and plant growth regulators)on the regeneration rate and grain yield of the ratoon season.It summarizes and analyzes the possible mechanisms that affect the germination of regenerated buds from the perspectives of material accumulation and transportation,hormone metabolism,and molecular mechanisms,and identifies main factors currently limiting the development of ratoon rice.A significant positive correlation between the regeneration rate and grain yield of the ratoon season was found,regulated by varieties,temperatures,light resources,and cultivation measures.Improving the regeneration rate can effectively increase the production of ratoon rice.Notably,rice varieties with high regeneration ability exhibit characteristics such as a suitable growth period,a developed root system,high single-stem weight,a relatively small ratio of grain number to green leaf area,and strong lodging resistance in the main season.Additionally,the germination of regenerated buds is regulated by the accumulation and transport of endogenous hormones(indole-3-acetic acid,gibberellins,and cytokinins),photoassimilates(non-structural carbohydrates),and reactive oxygen metabolism.To further demonstrate the grain yield potential of the ratoon season,improvements are needed in three key areas:the cultivation system of low-stubble ratoon rice,the development of specialized harvesters,and the breeding of rice varieties with high-temperature tolerance during the main crop and low-temperature tolerance during the ratoon crop.

关 键 词：ratoon rice regeneration rate plant hormone grain yield 

分 类 号：S51[农业科学—作物学]