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At least 109 records · Page 6Linked to original sources
PubMed1973

The hormone content of ripening grape berries and the effects of growth substance treatments.

Berries on field-grown Vitis vinifera cv. Doradillo were treated at different times during stage II with benzothiazole-2-oxyacetic acid or 2-chloroethylphosphonic acid, and measurements were made of their growth and hormone content. The concentration of ethylene was low during stage II and declined as berries ripened. Both 2-chloroethylphosphonic acid and benzothiazole-2-oxyacetic acid caused increases in ethylene concentration, yet they had varying effects on ripening: the former applied at the start of stage II and the latter applied 1 week before the end of stage II delayed ripening, while 2-chloroethylphosphonic acid applied at the end of stage II hastened ripening.The abscisic acid content of berries increased as they ripened, and the effects of 2-chloroethylphosphonic acid and benzothiazole-2-oxyacetic acid on abscisic acid levels were correlated with the effect of these compounds on ripening. The roles of abscisic acid and ethylene in the regulation of the ripening of grapes are discussed.

Journal Article↗
PubMed1975

Biochemical changes in Pinus pinea seeds. II. The stimulation is isocitrate lyase and malate dehydrogenase activities by exogenous growth substances.

Treatment of intact pine seeds with plant hormones and steroid substances for several days, after an initial 24 hour immersion in different hormone solutions, resulted in a substantial increase in the specific activity of isocitrate lyase and malate dehydrogenase than the observed in the corresponding control solutions. Fresh weights did not show any increase, because water uptake was reduced in presence of plant hormones (indolacetic acid, kinetine and giberellic acid). However, dry weights were consistently greater than those of the control solutions.

Enzyme Induction↗