Details

Autor(en) / Beteiligte

• Baier, Margarete
• Bittner, Andras
• Prescher, Andreas
• Buer, Jörn

Titel

Preparing plants for improved cold tolerance by priming

Ist Teil von

• Plant, cell and environment, 2019-03, Vol.42 (3), p.782-800

Ort / Verlag

United States: Wiley Subscription Services, Inc

Erscheinungsjahr

2019

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Cold is a major stressor, which limits plant growth and development in many parts of the world, especially in the temperate climate zones. A large number of experimental studies has demonstrated that not only acclimation and entrainment but also the experience of single short stress events of various abiotic or biotic kinds (priming stress) can improve the tolerance of plants to chilling temperatures. This process, called priming, depends on a stress “memory”. It does not change cold sensitivity per se but beneficially modifies the response to cold and can last for days, months, or even longer. Elicitor factors and antagonists accumulate due to increased biosynthesis or decreased degradation either during or after the priming stimulus. Comparison of priming studies investigating improved tolerance to chilling temperatures highlighted key regulatory functions of ROS/RNS and antioxidant enzymes, plant hormones, especially jasmonates, salicylates, and abscisic acid, and signalling metabolites, such as β‐ and γ‐aminobutyric acid (BABA and GABA) and melatonin. We conclude that these elicitors and antagonists modify local and systemic cold tolerance by integration into cold‐induced signalling cascades. Stress pretreatment can prime plants in the seed, in the generative and in the vegetative stage for improved cold tolerance. We summarize the present knowledge on mechanisms involved in memorizing cold and priming plant for improved cold tolerance in a hypothesis combining epigenetic regulation with modulation of canonical cold signalling pathways by stress induced elicitor and silencer factors.