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Gamma radiation and hormone treatment as tools to reduce salt stress in rice (Oryza sativa L.)

한국식물학회지 2006년 49권 3호 p.257 ~ 257
Baek Myung-Hwa, 정병엽, Kim Jin-Hong, 위승곤, Kim Jae-Sung, 이인중,
소속 상세정보
 ( Baek Myung-Hwa ) - Korea Atomic Energy Research Institute Advanced Radiation Technology Institute
정병엽 ( Chung Byung-Yeoup ) - Korea Atomic Energy Research Institute Advanced Radiation Technology Institute
 ( Kim Jin-Hong ) - Korea Atomic Energy Research Institute Advanced Radiation Technology Institute
위승곤 ( Wi Seung-Gon ) - Korea Atomic Energy Research Institute Advanced Radiation Technology Institute
 ( Kim Jae-Sung ) - Korea Atomic Energy Research Institute Advanced Radiation Technology Institute
이인중 ( Lee In-Jung ) - Kyungpook National University Department of Agronomy

Abstract


We investigated the effects of jasmonic acid (JA) and gamma irradiation on the growth and metabolic responses to salt stress in rice (Oryza sativa L.) plants. The relative growth rate (RGR), relative water content (RWC), and chlorophyll (Chl) content were lower in NaCI-treated plants than in the control, whereas the malondialdehyde content (MDA), electrolyte leakage (EL), and contents of proline and abscisic acid (ABA) were higher in the treated plants. When induced by the salt stress, those effects, however, were somewhat alleviated by the application of JA or gamma irradiation. The most significant response was manifested by the proline content, with relatively lower values for alleviation being recorded for the contents of RGR, RWC, Chl, and MDA, as well as EL. Moreover, although total Chl content was not significantly influenced by JA or gamma irradiation in plants under salt stress, an increase in the level of Chl a resulted in a markedly changed ratio of Chl a/b. The degree of alleviation, in terms of growth and metabolic responses, was more extensive for JA-treated plants than for those exposed to gamma irradiation.

키워드

gamma irradiation; jasmonic acid; rice; salt stress

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