Xylem abscisic acid accelerates leaf abscission by modulating polyamine and ethylene synthesis in water-stressed intact poplar

Abstract

We investigated the effects of endogenous and exogenous abscisic acid (ABA) on polyamines (PAs) and ethylene synthesis and their relevance to leaf senescence in 1-year-old intact cuttings of a drought-sensitive poplar genotype Populus × euramericana cv. I-214 (cv. Italica) and a drought-tolerant genotype P. popularis 35–44 (P. popularis). P. popularis… (More)
DOI: 10.1007/s00468-001-0138-2

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