Algae abscisic acid

Subjects reviewed during the year include the carotenoids of algae,3 methods for carotenoid synthesis4 and the chemistry and biochemistry of abscisic acid.5... 

Dhaliwal AS, Dhaliwal GK, Moloney RJ (1973) Effect of indoleacetic acid on the growth patterns of blue-green algae. J Phycol 9 Suppl 14 Dhindsa RS, Beasley CA, Ting IP (1976) Effects of abscisic acid on in vitro growth of cotton fiber. Planta 130 197-201... 

In a recent review Cote and Crain [5] have pointed to three phenomena which they thought particularly convenient to study the physiological role of phosphoinositides in plants. These were 1) the turgor changes in stomatal guard cells, paiticulaiiy after a treatment with abscisic acid which provokes the closure of stomata, 2) the osmotic stress in Dunaliella salina or carrot cell cultures and 3) the deflagellation of Chlamydomonas reinhardtii after exposure of the alga to acid pH, elevated temperature or ethanol. Nevertheless the rates of apparition of inositolphosphates after stimulation have been found very different in various plant tissues (from 30 sec to 30 min). 

Abscisic acid (ABA) and lAA were analyzed by in situ spectrodensitometry on Silufol and Merck (N 5721) plates. The best separation of ABA and lAA was performed with chloroform-acetic acid (17 3) (97). In algae culture merha, the released ABA was studied after extraction. Silica gel 60 F254 HPTLC plates were developed with benzene-ethyl acetate-water (5 4 1), and the concentration was quantified by scanning densitometry at 270 nm (97a). 

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