메뉴 건너뛰기
소속 기관 / 학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
고객센터 ENG
주제분류

논문 기본 정보

저자정보
출처
Oxford University Press (OUP) Horticulture Research 11(9)
오류 신고하기
표지

검색

    초록·키워드

    The overload of Cl<sup>-</sup> typically causes cell damage and death in plants, especially in Cl<sup>-</sup>-sensitive crops. Abscisic acid (ABA) is a stress-induced phytohormone that can alleviate chloride stress by reducing Cl<sup>-</sup> accumulation; however, the mechanism is not clear. Here, we found that the application of ABA elevated Cl<sup>-</sup> efflux from roots and reduced membrane damage and cell death in chloride-stressed <i>Malus hupehensis</i>. <i>MhSLAH3</i>, a homolog of the slow anion channel from <i>M. hupehensis</i>, encoded a channel controlling Cl<sup>-</sup> efflux and was induced by both chloride and ABA. <i>MhSLAH3</i> overexpression accelerated Cl<sup>-</sup> efflux, which enhanced the tolerance of <i>M. hupehensis</i> to chloride stress, and retarded chloride-induced cell death. However, the suppression of <i>MhSLAH3</i> partially offset the acceleration effect of ABA on Cl<sup>-</sup> efflux. MhZAT10L was then identified as a C2H2-type transcription factor upstream of <i>MhSLAH3</i>, repressing <i>MhSLAH3</i> transcription under chloride stress. The suppression of <i>MhZAT10L</i> accelerated Cl<sup>-</sup> efflux by releasing suppressed <i>MhSLAH3</i>, but <i>MhZAT10L</i> overexpression counteracted the effects of ABA on Cl<sup>-</sup> efflux. MhABI5 promoted Cl<sup>-</sup> efflux mediated by <i>MhSLAH3</i> due to induction by ABA and transcriptional repression of <i>MhZAT10L</i>, but this function of MhABI5 was reversed by <i>MhZAT10L</i> overexpression. The suppression of <i>MhABI5</i> diminished the positive effects of ABA on Cl<sup>-</sup> efflux and retarding cell death. Thus, ABA repressed <i>MhZAT10L</i> transcription by activating MhABI5, further releasing <i>MhSLAH3</i> to accelerate Cl<sup>-</sup> efflux. These findings provide a new evidence of ABA regulation of Cl<sup>-</sup> efflux.

    본문·목차

    최근 본 자료 전체보기