CAJ | 학술논문

以小麦顺序衰老（正置茎）和非顺序衰老（倒置茎）茎为材料，比较研究了自然天气和干旱条件下小麦正置茎和倒置茎叶片绿叶面积、光合速率、蔗糖磷酸转运酶活性以及地上器官同化物积累和转运特性，旨为进一步研究小麦叶片非顺序衰老的生理生化机制提供思路和理论指导。试验表明：无论是自然天气条件还是干旱条件，温麦19、豫麦19和兰考矮早8倒置茎倒二叶的绿叶面积、光合速率和叶片干重均明显高于旗叶，表现出旗叶早于倒二叶衰老的特征；倒置茎花后同化物转运量、转运率和对籽粒的贡献率、穗重以及叶片蔗糖磷酸合成酶活性均明显高于正置茎。表明小麦叶片的非顺序衰老与花后同化物的快速转运有关，这种衰老方式对小麦籽粒的后期充实是有利的，并且对干旱条件有较强的适应能力。
이소맥순서쇠로（정치경）화비순서쇠로（도치경）경위재료，비교연구료자연천기화간한조건하소맥정치경화도치경협편록협면적、광합속솔、자당린산전운매활성이급지상기관동화물적루화전운특성，지위진일보연구소맥협편비순서쇠로적생리생화궤제제공사로화이론지도。시험표명：무론시자연천기조건환시간한조건，온맥19、예맥19화란고왜조8도치경도이협적록협면적、광합속솔화협편간중균명현고우기협，표현출기협조우도이협쇠로적특정；도치경화후동화물전운량、전운솔화대자립적공헌솔、수중이급협편자당린산합성매활성균명현고우정치경。표명소맥협편적비순서쇠로여화후동화물적쾌속전운유관，저충쇠로방식대소맥자립적후기충실시유리적，병차대간한조건유교강적괄응능력。
Under natural weather and drought conditions ,green leaf area ,photosynthetic rate and sucrose-phosphate synthase activity of top three leaves ,assimilate accumulation and transport characteristics in wheat leaf sequential and non-sequential senescence were measured in order to provide insights into the physiological and biochemical mechanisms of wheat leaf non-sequential senescence .The results show that ,for natural weather and drought condition ,the top 2nd leaf green area ,photosynthetic rate and dry matter of inverted stems of Wenmai19 ,Yumai19 and Lankaoaizao8 are higher than those of flag leaf ,indicating earlier senesce of flag leaf than that of top 2nd leaf .Assimilation transportation ,trans-porting rate and contribution rate to grain after anthesis ,and leaf sucrose-phosphate synthase activity of inverted stems in two treatments were greater than that of conventional stems ,suggesting that wheat leaf non-sequential senescence is asso-ciated with the rapid transport of assimilation .Leaf non-sequential senescence is beneficial to grain filling ,rendering strong adaptation to drought stress .