Jul 2026· New Phytologist· Vol 251, pp. 2337-2343· 0 citations· 62 references
Medicine
TL;DR
It is proposed that chronic low temperature may contribute importantly to this pattern through hormonal regulation, notably reduced gibberellin availability and persistence of DELLA‐like repressors, together with altered auxin and brassinosteroid signaling.
Abstract
Treelines mark a functional limit of upright tree growth rather than a strict survival boundary. At these cold margins, photosynthesis and nonstructural carbohydrate reserves often remain sufficient, whereas apical and cambial growth decline, arguing against carbon limitation as the primary cause of growth cessation. We propose that chronic low temperature may contribute importantly to this pattern through hormonal regulation, notably reduced gibberellin availability and persistence of DELLA‐like repressors, together with altered auxin and brassinosteroid signaling. This could maintain meristems in a growth‐repressive state despite continued metabolic activity. We do not present this as the sole explanation for treeline formation, but as a plausible and testable regulatory mechanism that may operate alongside generally reduced metabolic rates and hydraulic or energetic constraints.
Leaf senescence is a critical developmental transition that drives nutrient remobilization, profoundly impacting plant fitness and forest productivity. In dioecious plants, divergent reproductive costs drive sex-specific life-history strategies, yet how these fundamental differences are rewired at the senescence level...
Fang He, Yuan Zhang, Shuang-Lian Deng et al.· Tree Physiology· 0 citations
This review synthesizes recent advances in elucidating the molecular and physiological mechanisms underlying drought tolerance in Vitis vinifera to provide an integrative conceptual framework to support sustainable viticulture in water-limited environments.
The cytoskeleton regulates cell division, intracellular transport and cell-wall patterning, but its roles in secondary growth and long-term stress responses in woody plants remain poorly understood. We classify individual claims as direct functional evidence from woody species (Level I), correlative or functionally non...
Yun-Jia Qiu, Yu Zhang, Quan-Ling Sui et al.· Plant, Cell and Environment· 0 citations
It is demonstrated that leaf phenotypic convergence can mask divergent control architectures modulated by root anatomical traits, which help distinguish between water-conservative and water-spending behaviours and provide critical parameters for identifying genotypes with enhanced resilience to environmental stress.
Sara Anichini, S. Parri, A. Bellini et al.· Plant physiology and biochem...· 0 citations
Plant encounters with saline conditions trigger a phase of osmotic stress, followed by ionic stress as salt accumulates in plant tissue. Jasmonate (JA) signalling plays a vital role in both phases, but its role for adaptation depends on timing. Using wild-type rice (Oryza sativa L. cv. Kitaake) and a JA-deficient allen...
Nitin Pawar, M. Riemann, E. Eiche et al.· bioRxiv· 0 citations
