Effect of Gibberellic Acid on Crown Gall Tumor Induction in Aging Primary Pinto Bean Leaves

Effect of gibberellic Acid on crown gall tumor induction in aging primary pinto bean leaves.

Gibberellic acid was tested for its effect on tumor induction by Agrobacterium tumefaciens in primary pinto bean (Phaseolus vulgaris) leaves in various stages of development. The hormone was found to promote tumor induction in partially aged leaves but did not effect tumor induction in very young leaves or in fully matured leaves. It is suggested that the natural loss of susceptibility to tumor...

Acid-soluble nucleotides of pinto bean leaves at different stages of development.

Acid-soluble nucleotides of unifoliate leaves of Pinto bean plants (Phaseolus vulgaris L.) were determined at young, mature, and senescent stages of development. At least 25 components could be distinguished on the basis of inorganic phosphorus determinations and 37 or more fractions on the basis of (32)P labeling, with adenosine di- and triphosphates accounting for 60% of the total moles of nu...

Recovery of crown-gall tumor cells.

nant animal cells are distinguished from healthy or inflaznmstory cells. In emphasizing the perma nency of the cellular alteration, Kidd (6) states that “Cancercells remain such until they die . . they never turn back en masse towards the benign or normal state. . . .“The inability to accomplish a reversal of malignant to normal cells under con trolled conditions has, however, served as a s...

The Effect of Gibberellic Acid on Enzyme Activity and Oxygen Uptake in Bean Plants (Phaseolus Vulgaris).

Gibberellic acid, a tetracyclic dihydroxylactonic acid, C1H2206, produces marked shoot elongation in many plants (2, 3, 11, 12, 13). Unlike other auxins, its stimulation of growth of intact plants often results in substantial increases in height, and in fresh and dry weights (2). Brian (2) noted that the ash, nitrogen, phosphorus, potassium, total soluble carbohydrates, and carbon increased in ...

Effect of gibberellic acid on fruit cracking in meykhosh pomegranate