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Planta. 2004 Apr;218(6):958-64. Epub 2004 Jan 10.

Maternal synthesis of abscisic acid controls seed development and yield in Nicotiana plumbaginifolia.

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1
Laboratoire de Biologie des Semences, UMR 204 INRA-INAPG, 78026 Versailles, France.

Abstract

The role of maternally derived abscisic acid (ABA) during seed development has been studied using ABA-deficient mutants of Nicotiana plumbaginifolia Viviani. ABA deficiency induced seed abortion, resulting in reduced seed yield, and delayed growth of the remaining embryos. Mutant grafting onto wild-type stocks and reciprocal crosses indicated that maternal ABA, synthesized in maternal vegetative tissues and translocated to the seed, promoted early seed development and growth. Moreover ABA deficiency delayed both seed coat pigmentation and capsule dehiscence. Mutant grafting did not restore these phenotypes, indicating that ABA synthesized in the seed coat and capsule envelope may have a positive effect on capsule and testa maturation. Together these results shed light on the positive role of maternal ABA during N. plumbaginifolia seed development.

PMID:
14716564
DOI:
10.1007/s00425-003-1180-7
[Indexed for MEDLINE]
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