ICAR-Indian Institute of Maize Research, P.A.U. Campus, Ludhiana, India.
Physiol Plant. 2021 Jun;172(2):1162-1169. doi: 10.1111/ppl.13343. Epub 2021 Feb 25.
Low-moisture stress, also referred to as drought, is one of the major factors that negatively impact the agricultural yield. The present scenario of climate change is expected to aggravate it further. Considering the extended time required to develop resistant crops, it is important to prioritize research efforts for coping with low moisture, prevalent in arid and semi-arid regions of the world. While agricultural yield is a tradeoff between many choices, tolerance to biotic and abiotic stresses comes with yield penalties. To balance the tradeoffs and maximize productivity, the use of region-specific cultivars and/or introgression of precise genetic proportions in an elite variety may prove useful. Stress memory is an emerging approach that helps plants to record and respond to repeated stress in an effective manner. In this context, we discuss the role of "stress memory" in imparting drought tolerance in plants. Future research efforts for its effective deployment for "drought hardening" in agricultural settings, along with a discussion on the yield tradeoff involved, is implicated.
低湿胁迫，也称干旱，是严重影响农业产量的主要因素之一。气候变化的现状预计将进一步加剧这一问题。考虑到培育抗性作物所需的时间较长，优先开展应对低湿的研究工作十分重要，因为低湿在世界干旱和半干旱地区普遍存在。虽然农业产量是多种选择之间的权衡，但对生物和非生物胁迫的耐受性会带来产量损失。为了平衡这些权衡，最大限度地提高生产力，可以使用特定区域的品种，或者在优良品种中导入精确的遗传比例。胁迫记忆是一种新兴的方法，可以帮助植物有效地记录和应对重复的胁迫。在这方面，我们讨论了“胁迫记忆”在赋予植物耐旱性方面的作用。本文还讨论了相关的产量权衡问题，并暗示了未来在农业环境中有效部署“干旱驯化”的研究工作。
