摘要
在干旱棚栽培条件下以宁糜13号、内糜5号和晋糜4号糜子品种为材料,观测分析不同品种花后叶片叶绿素含量、保护酶活性(SOD、CAT、POD)以及丙二醛含量变化。结果表明,参试品种各功能叶片叶绿素含量及SOD、CAT、POD活性均在开花14 d后逐渐下降,MDA含量随着叶片的衰老而升高;参试品种叶片衰老的总体变化趋势一致,但衰老进程存在差异。与内糜5号和晋糜4号相比,宁糜13号叶绿素下降幅度小,各功能叶片衰老过程中SOD、CAT活性下降较慢,POD活性下降较快,MDA含量增加幅度小,叶片功能期长,衰老缓慢,有利于光合产物的积累;干旱条件下,叶绿素含量、过氧化氢酶CAT、超氧化物歧化酶SOD与单株产量呈正相关,而过氧化物酶POD、丙二醛MDA与单株产量呈负相关。
In three broomcorn millet varieties of Ningmi 13,Neimi 5 and Jinmi 4 which were planted in arid shed,chlorophyll contents,SOD,CAT,POD activities and MDA contents were analyzed after flowering under drought.The results showed that the chlorophyll contents,SOD,CAT and POD activities decreased gradually from 14 days after the varieties flowered,but MDA contents increased gradually as leaves senescence went on.Although the leaves of the varieties presented a similar tendency in their senescence,their senescence progresses differed significantly.Compared with Neimi 5 and Jinmi 4,the leaves of Ningmi 13 declined slowly in chlorophyll contents,SOD,and CAT activities,declined fast in POD activity,and increased slowly in MDA content,thus prolonging their function duration and slowing down the senescence of its leaves,which is conductive to the accumulation of photosynthate;Chlorophyll content,SOD and CAT activities had the positive correlation with yield per plant,but POD and MDA content had negative correlation with yield per plant under drought condition.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第2期99-103,108,共6页
Agricultural Research in the Arid Areas
基金
国家高技术研究发展计划(863计划)项目(2006AA100201)
西北农林科技大学唐仲英育种基金(NO.50)
关键词
糜子
叶片衰老
干旱
保护酶活性
broomcorn millet
leaf senescence
drought
activity of protective enzyme
