𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effect of osmotic stress on abscisic acid levels in xylem sap of sunflower (Helianthus annuusL.)

✍ Scribed by G. V. Hoad

Publisher
Springer-Verlag
Year
1975
Tongue
English
Weight
285 KB
Volume
124
Category
Article
ISSN
0032-0935

No coin nor oath required. For personal study only.

✦ Synopsis

Addition of an osmoticum (-12 bars) to the rooting medium of sunflowers (Helianthus annuus L.) caused an increase in the level of abscisic acid (ABA) present in xylem exudate subsequently collected from cut shoots. Using tall and dwarf plants it was shown that there was a time lag in the appearance of increased levels of ABA in tall plants when compared with dwarf plants. The results indicate that the leaves, rather than the roots are the site of synthesis of ABA present in the xylem sap of osmotically stressed sunflower plants.

πŸ“œ SIMILAR VOLUMES

Levels of short-chain fatty acids and of
Levels of short-chain fatty acids and of abscisic acid in water-stressed and non-stressed leaves and their effects on stomata in epidermal strips and excised leaves
✍ C. M. Willmer; R. Don; W. Parker πŸ“‚ Article πŸ“… 1978 πŸ› Springer-Verlag 🌐 English βš– 707 KB

Straight-chain saturated fatty acids (C6-C11) and abscisic acid (ABA) accumulate in the leaves of Phaseohts vulgaris L. and Hordeum vulgare L. under water stress. ABA and certain of the fatty acids, particularly decanoic and undecanoic acid, can inhibit stomatal opening and cause stomatal closure in