The presence of abscisic and phaseic acid in a purified acidic extract from flowering plants of the long-short-day plant Bryophyllum daigremontianum [(R. Hamet and Perr.) Berg.] was conclusively established by combined gas chromatography-mass spectrometry (GC-MS) of their methyl esters. Gibberellin
Identification of gibberellins A17, A25, A45, abscisic acid, phaseic acid, and dihydrophaseic acid in seeds of Pyrus communis
โ Scribed by George C. Martin; Frank G. Dennis Jr.; Paul Gaskin; Jake Macmillan
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 388 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0031-9422
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Seven day old seedlings of Pisum sativum L., cv. Kleine Rheinlรคnderin, were wilted for 3 days. After partially removing the roots, they were rewatered and at the same time radioactive abscisic acid([1-(14)C]ABA, spec. activity 1.7ยท10(8)d s(-1)mmol(-1)) was applied for 1 h via the xylem of the roots.
Using isolated lettuce seed embryos it can be shown that the inhibitory effect of abseisic acid upon germination is reversed solely by cy~okinin. In the intact seed, however, gibberellic acid is also required for this reversal to be manifested in germination.
We have studied two lines of sunflower (Helianthus annuus L.) selected in the field as drought-tolerant (RI genotype) or drought-sensitive (S 1 genotype). When subjected to drought conditions, the RI line was able to maintain high leaf water potential longer and wilted later than the S 1 line. There