Growth and Gibberellin A1 Metabolism in Excised Lettuce Hypocotyls
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چکیده
منابع مشابه
Growth and gibberellin a(1) metabolism in excised lettuce hypocotyls.
Excised lettuce (Lactuca sativa L. cv. Arctic) hypocotyls retain the ability to elongate in response to exogenously supplied gibberellic acid and gibberellin A(1) (GA(1)). We have studied the relationship between metabolism of GA(1) and elongation in this tissue. In 24 hours at 28 C, hypocotyls treated with 3 mum GA(1) double in length while controls elongate less than 45%. After an exogenous h...
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Recent studies of anthocyanin formation have involved the use of a varied assortment of plant systems: seedlings, leaves, fruits, petals, callus cultures, and Lemnaceous flowering plants (2,9). Each of these kinds of material possesses certain advantages and certain disadvantages. In the dark-grown buckwheat seedling anthocyanin synthesis can be induced in the hypocotyl by exposure of that orga...
متن کاملGibberellin Production in Pea Seeds Developing in Excised Pods: Effect of Growth Retardant Amo-1618.
The gibberellin content of pea seeds developing in excised pea pods cultured on a medium containing the plant growth retardant AMO-1618 was reduced in comparison with pea seeds cultured on retardant-free medium. The reduction increased with increasing concentrations of AMO-1618. However, at the lowest concentration tested (5 milligrams per liter) the growth of the seeds was not affected whereas...
متن کاملGibberellin metabolism and signaling.
Gibberellins (GAs) are a family of plant hormones controlling many aspects of plant growth and development including stem elongation, germination, and the transition from vegetative growth to flowering. Cloning of the genes encoding GA biosynthetic and inactivating enzymes has led to numerous insights into the developmental regulation of GA hormone accumulation that is subject to both positive ...
متن کاملCorrelative Studies on Plant Growth and Metabolism. I. Changes in Protein and Soluble Nitrogen Accompanying Gibberellin-Induced Growth in Lettuce Seedlings.
The remiiarkable inicrease in longitudinal growth of plants by applied gibberellins is well known. Information on accomlpanyvinig metabolic changes is ucl mllore limited ancd ofteln conicerned with relatively late stages of the growth response so that its hearing on the prinlarv chaniges cauised by the gibherellin is tuncertaini. The present paper deals vith clhaniges in protein anid soluible n...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1977
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.59.2.211