ArticleFrontiers in plant science2026
Response of root morphology and anatomy of two alfalfa cultivars with contrasting root system architecture to phosphorus deficiency under drought stress.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: The mechanisms underlying adaptations of root system architecture (RSA) and root anatomy to phosphorus (P) deficiency and drought stress remain unclear in alfalfa ( Methods: Root morphology and anatomy were assessed under varying P (0, 5, 20 mg P kg Results: Under low P and drought stress within the rhizoboxes, WL354 increased fine roots in soil layers below 60 cm, maintained xylem vessel area (XVA) in lateral roots below 90 cm, enlarged cortical cell size (CCS) in taproots and 2 Discussion: Under P deficiency and drought, WL354 implemented a resource acquisition strategy by increasing resource capture and transport in deep soil, and uptake efficiency. In contrast, LD exhibited a relatively conservative strategy focused on uptake efficiency. An increase in total root surface area and xylem vessel area of the taproot may help promote shoot P uptake. These findings offer insight into root trait-based strategies for improving alfalfa productivity in low-P and drought regions.
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