期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 105, 期 50, 页码 19744-19749出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0810730105
关键词
myosin; organelle transport; plant development
资金
- National Institutes of Health [1S10RR107903-01]
Flowering plants have evolved multigene families of the class XI myosin motors, the functions of which remain poorly understood. Here, we investigated functional profiles of the Arabidopsis myosins that belong to two paralogous pairs, XI-K/XI-1 and XI-2/XI-B, using single and double gene-knockout mutants. It was found that the myosins XI-K, XI-2, and XI-B, but not XI-1 have overlapping and additive roles in the root hair elongation. A nonidentical set of the three myosins, XI-K, XI-1, and XI-2, exhibited partially redundant and additive roles in the transport of Golgi stacks, peroxisomes, and mitochondria. Conspicuously, the double xi-k/1 knockout plants that showed the largest cumulative reduction of the organelle velocities also exhibited a stunted plant growth and reduced fecundity phenotype. Collectively, these results suggest that the rapid, myosin-powered organelle trafficking is required for the optimal plant growth, whereas a distinct myosin function, presumably the vesicular transport, is involved in elongation of the root hairs. In addition, our data imply that the myosin gene duplication in plants has been followed by a gradual functional specialization of the resulting pairs of myosin paralogs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据