The development of chloroplast ultrastructure and Hill reaction activity during leaf ontogeny in different maize (Zea mays L.) genotypes
The development of chloroplast ultrastructure and Hill reaction activity during leaf ontogeny in different maize (Zea mays L.) genotypes
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DOI：
10.1023/a:1007031818695
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发表时间：
1999-01-01
期刊：
影响因子：
2.7
通讯作者：
Körnerová, M
中科院分区：
文献类型：
--
作者：
Kutík, J;Kocová, M;Körnerová, M
利用极谱放氧法、透射电子显微镜和体视学方法研究了玉米第三叶个体发育过程中叶肉细胞(MC)叶绿体Hill反应活性和超微结构的变化。对两个不同自交系及其正反交F1的幼叶、成熟叶和衰老叶的叶绿体超微结构进行了比较。在叶片个体发育的不同阶段，HRA和MC的叶绿体超微结构均有显著差异。叶绿体成熟衰老最显著的特征是叶绿体球蛋白的生长。与幼叶相比，成熟和衰老叶片中的叶绿体具有更发达的类囊体体系统。较高的HRA通常与MC叶绿体的类囊体密度较高有关。
Changes in Hill reaction activity (HRA) and ultrastructure:of mesophyll cell (MC) chloroplasts were studied during the ontogeny of third leaf of maize plants using polarographic oxygen evolution measurement, transmission electron microscopy, and stereology. The chloroplast ultrastructure was compared in young (actively growing), mature, and senescing leaves of two different inbreds and their reciprocal F1 hybrids. Statistically significant differences in both HRA and MC chloroplast ultrastructure were observed between different stages of leaf ontogeny. Growth of plastoglobuli was the most striking characteristic of chloroplast maturation and senescence. The chloroplasts in mature and senescing leaves had a more developed system of thylakoids compared to the young leaves. Higher HRA was usually connected with higher thylakoid volume density of MC chloroplasts.