Physiological characterization of 'stay green' wheat cultivars during the grain filling stage under field growing conditions
Physiological characterization of 'stay green' wheat cultivars during the grain filling stage under field growing conditions
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田间生长条件下“常绿”小麦品种灌浆期的生理特征
DOI：
10.1007/s11738-010-0475-0
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发表时间：
2010-09-01
影响因子：
2.6
通讯作者：
Luo, Peigao
中科院分区：
文献类型：
--
作者：
Chen, Junbo;Liang, Yun;Luo, Peigao
黑麦（Secale cereale L.）染色体臂1 RS能延缓叶片衰老，H_2O_2含量的变化是衡量其延缓衰老能力的一个有用指标。以小麦-黑麦1BL/1 RS易位系川农12（CN 12）和川农18（CN 18）的亲本MY 11为对照，研究了两个小麦品种开花后H2 O2的变化及生理指标。结合CdSe/ZnS量子点（QD）荧光峰值的变化和形态学观察表明，CN 12和CN 18中H2 O2含量普遍低于MY 11。净光合速率（Pn）、气孔导度（G（s））、F-v/F-m'F-v'/F-m '和PS Ⅱ光化学猝灭（qP）均在测定后期高于MY 11。在灌浆期，CN 12和CN 18的光合能力比MY 11高且持续时间长，这可能与其清除H2 O2的机制有关。
Rye (Secale cereale L.) chromosome arm 1RS could delay leaf senescence, and change in H2O2 content is a useful index for weighing the ability to delay the senescence. Two wheat cultivars, Chuannong12 (CN12) and Chuannong 18 (CN18), harboring the wheat-rye 1BL/1RS translocated chromosome were investigated for H2O2 change and physiological index after flowering under field conditions, and MY11, the agronomical parent of both CN12 and CN18, was used as the control. A combined change in the peak value of CdSe/ZnS quantum dot (QD) fluorescence and morphological observation indicated that the H2O2 contents in CN12 and CN18 were generally lower than that in MY11. They both had higher values for net photosynthetic rate (P-n), stomatal conductance (G(s)), F-v/F-m' F-v'/F-m', and photochemical quenching of PSII (qP) than MY11 only in the late measurement stage. Some small differences were also observed, such as CN12 and CN18 wheat cultivars having higher and longer photosynthetic competence than MY11 during the grain filling stage, which perhaps resulted from a mechanism for removing oxidative species, especially H2O2.