Leaf Tissue-Specific Phosphorus Allocation Is Linked to Leaf Lifespan in Chickpea Accessions.

In five chickpea accessions, leaf tissue-specific phosphorus allocation is more strongly linked to leaf lifespan than to PPUE or PRE, with mesophyll-biased allocation extending lifespan.

• Why it matters: Limited knowledge exists on how different cellular P-allocation patterns relate to physiological outcomes, including how allocation tradeoffs connect to lifespan and hormone-linked regulation.
• What they did: The study quantified leaf P fractions, PPUE, and P-remobilisation efficiency across five chickpea accessions with contrasting cellular P-allocation, alongside leaf lifespan and phytohormones including ABA, SA, and jasmonates.
• The result: Greater mesophyll P allocation predicted longer leaf lifespan and was associated with lower jasmonate concentrations (not ABA), while epidermal P allocation reflected higher metabolite P and mesophyll P correlated negatively with calcium.

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