Differential response of maize catalases to abscisic acid: Vp1 transcriptional activator is not required for abscisic acid-regulated Cat1 expression.

Pathways to abscisic acid-regulated gene expression

 Summary I.  358 II.      359 1. Seed development 359 (a) Maturation 359 (b) Dormancy and germination 361 2. Vegetative responses 365 (a) Root growth 366 (b) Overlapping stress response pathways 367 III. ‘  ’      371 1. ABA-regulated gene products 371 2. Cis-acting elements 372 3. Trans-acting fa...

Fibrillin expression is regulated by abscisic acid response regulators and is involved in abscisic acid-mediated photoprotection.

Fibrillins are lipid-binding proteins of plastids that are induced under abiotic stress conditions. In response to environmental stress, plants generate abscisic acid (ABA) as an endogenous signal. We show that ABA treatment and fibrillin accumulation enhance the tolerance of photosystem II toward light stress-triggered photoinhibition in Arabidopsis. ABA induces fibrillin accumulation, and the...

Abscisic Acid and Stress Signals Induce Viviparous1 (Vp1) Expression in Seed and Vegetative Tissues of Maize

Viviparous1 (Vp1) encodes a B3 domain-containing transcription factor that is a key regulator of seed maturation in maize. However, the mechanisms of Vp1 regulation are not well understood. To examine physiological factors that may regulate Vp1 expression, transcript levels were monitored in maturing embryos placed in culture under different conditions. Expression of Vp1 decreased after culture...

Abscisic Acid biosynthesis and response.

Gene expression in response to abscisic acid and osmotic stress.

Abscisic acid (ABA) was discovered in the 1950s to be a phytohormone affecting leaf abscision and bud dormancy. It was soon characterized as a sesquiterpene derived from mevalonate although certain steps of its biosynthesis in plants are still unknown (Li and Walton, 1987; Zeevaart and Creelman, 1988). Continuing work on ABA has shown that it mediates various developmental and physiological pro...