DELLA-GRF4-mediated coordination of growth and nitrogen metabolism paves the way for a new Green Revolution

• 来源期刊: 中国科学（生命科学）
• 年，卷（期）: 2018,（9）
• 页码范围: 1130-1131
• 页数: 2页
• 语种: 中文

摘要

The Green Revolution (GR) based on semi-dwarf breeding has greatly increased cereal crop yields since the 1960's.Owing to appropriate plant height,the semi-dwarf crop plants are beneficial to increase light utilization and improve the lodging-resistance,and eventually increase yield potential (Hedden,2003).During the past 50 years,the worldwide application of semi-dwarf crop breeding has produced plenty of elite varieties.The characters of Green Revolution varieties (GRVs) are caused by the mutant growth-repressing genes,such as reduced height (Rht) in wheat (Peng et al.,1999) and semi-dwarfl (sdl) in rice (Sasaki et al.,2002).The semi-dwarfism of sdl rice plants is due to an impaired gibberellic acid (GA) synthesis pathway (Sasaki et al.,2002).It is known that GA 20-oxidase 2 (GA20ox2) catalyzes GA53 to GA20 in the GA synthesis pathway.In sdl plants,GA53 was over-accumulated and GA20 was scarce,due to loss-of-function of the GA20OX2 gene in the sdl locus (Sasaki et al.,2002).