Structural and biochemical mechanism responsible for the stay-green phenotype in common wheat
Structural and biochemical mechanism responsible for the stay-green phenotype in common wheat
复制标题
DOI：
10.1007/s11434-006-2175-0
复制
发表时间：
2006-11-01
影响因子：
--
通讯作者：
Feng Juan
中科院分区：
文献类型：
--
作者：
Luo Peigao;Ren Zhenglong;Feng Juan
为提高小麦籽粒同化碳的供应量，选育了叶片衰老延迟的小麦新品种川农17（CN 17），该品种携带小麦-黑麦1 RS. 1BL易位染色体。与对照相比，CN 17在灌浆期的净光合速率（P-n）、叶绿素（Chl）含量、丙二醛（MDA）含量、超氧化物歧化酶（SOD）和过氧化氢酶（CAT）活性以及旗叶衰老等方面存在显著差异。与对照相比，新品种保持了较长的光合能力，这与叶绿体发育的差异有关。此外，在自然生长条件下，CN 17也观察到了持绿表型。因此，在保绿品种的生理，生化和结构方面的协调产生较高的种子重量和单株产量比对照品种。
In order to increase the supply of assimilated carbon to grain, a new stay-green wheat cultivar, Chuannong17 (CN17), with delayed leaf senescence, carrying wheat-rye 1RS.1BL translocated chromosome was developed. CN17 exhibited distinct differences in net photosynthetic rate (P-n), chlorophyll (Chl) content, malondialdehyde (MDA) content, activity of both superoxide dismutase (SOD) and catalase (CAT) during the grain filling stage, and flag leaf senescence compared with the control. The new cultivar maintained longer and higher photosynthetic competence compared with the control, and this aspect correlated with the difference in chloroplast development. Moreover, the stay-green phenotype of CN17 was also observed under natural growth conditions. Consequently, the coordination of the physiological, biochemical, and structural aspects in the stay-green cultivar produced higher seed weights and per-plant yield compared with the control cultivar.