作物学报 ›› 2015, Vol. 41 ›› Issue (08): 1164-1171.doi: 10.3724/SP.J.1006.2015.01164
冯萍**,邢亚迪**,刘松,郭爽,朱美丹,娄启金,桑贤春,何光华,王楠*
FENG Ping**,XING Ya-Di**,LIU Song,GUO Shuang,ZHU Mei-Dan,LOU Qi-Jin,SANG Xian-Chun,HE Guang-Hua,WANG Nan*
摘要:
叶片是光合作用的主要器官,适度卷曲有利于改善群体光照,提高光能利用率,因此,发掘和研究叶片发育相关基因是改良株型和植物生长发育研究的重要基础工作。本研究报道了一个新的水稻稳定遗传卷叶突变体rolled leaf 28 (rl28),与野生型相比,rl28从孕穗期起叶片开始沿中轴脉向内侧卷曲,叶片的卷曲度均极显著高于野生型,且叶夹角也不同程度小于野生型。扫描电镜及石蜡切片观察表明,rl28叶片单位面积气孔数、气孔导度显著高于野生型,蒸腾速率极显著高于野生型,rl28中脉增大及临近的2个泡状细胞数量减少。遗传分析表明该突变性状受一对隐性核基因控制,RL28基因被定位在第5染色体标记5-43和5-34之间,物理距离为90 kb。本研究将为RL28基因的图位克隆及功能研究奠定基础。
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