인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.