Effect of Localized Scorch on the Transport and Distribution of Exogenous Jasmonic Acid in Vicia faba
文献类型: 外文期刊
第一作者: Liu, X
作者: Liu, X;Zhang, SQ;Lou, CH;Yu, FY
作者机构:
关键词: jasmonic acid;transport;distribution;wounding stress;wounding signal;vicia faba
期刊名称:ACTA BOTANICA SINICA ( 影响因子:0.599; )
ISSN:
年卷期:
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收录情况: SCI
摘要: Exogenous jasmonic acid (JA) has been showed to be able to induce stomatal closure in Vicia faba L. in previous investigations. The transport and distribution of ~3H-JA affected by localized scorch on V. faba seedling were studied with radioisotope technique. The results showed that ~3H-JA could be transported up or down at the rate of 4 - 5 cm·min~(-1) following feeding into root or shoot tip. The transport of ~3H-JA in shoot reached a relative stable rate at 30 min after being fed through root. Wounding by scorch in the youngest leaf caused an increase in the transport of ~3H-JA from root to shoot and enhanced the distribution of ~3H-JA in the wounded leaf. However, distribution of ~3H-JA in unwounded leaves increased after 5 h being fed through the youngest leaf. It was noticed that wounding improved accumulation of ~3H-JA in abaxial epidermis. Consistent results were obtained: wounding prevented transport of ~3H-JA out from the youngest leaf to root; These observations suggest that JA plays an important role as a defense signal and might be involved in the regulation of the stomatal movement in response to wounding stress.
分类号: Q94
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