Soluble sugars in light-sensitive Grand Rapids lettuce seeds treated with red light, gibberellic acid and a plant-derived smoke extract
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چکیده
منابع مشابه
Interaction between Kinetin and Light on Germination of Grand Rapids Lettuce Seeds.
At 260 Grand Rapids lettuce seeds require an exposure to white or red (6500A-6800A) light in order to germinate. This stimulating effect is reversed if this illumination is followed immediately by a brief exposure to far-red light (7000A-7500A). This phenomenon, discovered by Flint and McAllister (4), has been widely studied (3, 8). Many factors, such as lowering the temperature to 160 (1), can...
متن کاملEffects of Germination-promoting Substances Given in Conjunction with Red Light on the Phytochrome-mediated Germination of Dormant Lettuce Seeds (Lactuca sativa L.).
Ethylene or thiourea can substitute for gibberellic acid but not for red light in breaking the secondary dormancy induced by extended dark storage of fully hydrated lettuce seeds (Lactuca sativa cv. Grand Rapids). After 10 days of storage, ethylene, thiourea, or gibberellic acid applied either separately or in any combination in conjunction with red light induced near maximal germination. When ...
متن کاملInteractions of Applied Hormones in the Germination of Lepidium Virginicum Seeds
Tests of the germination response of light sensitive Lepidium virginicum seeds to applied gibberellic acid confirmed earlier reports that gibberellic acid can substitute for red light. Further tests indicated that promotion of germination by either red light or gibberellic acid can be nullified by abscisic acid. Dark incubation of the seeds in kinetin alone resulted in only slight promotion of ...
متن کاملCyanide-insensitive, Salicylhydroxamic Acid-sensitive Processes in Potentiation of Light-requiring Lettuce Seeds.
Phytochrome-mediated germination of Lactuca sativa L. cv. Waldmann's Green seeds was inhibited strongly by 10 millimolar salicylhydroxamic acid (SHAM), but only slightly delayed by the same level of KCN. SHAM was most effective if applied within the 8-hour potentiation period (release from dormancy) following red light treatment, but much less effective with completely potentiated seeds. SHAM a...
متن کاملEffect of Light and of Gibberellic Acid on the Changes in Protein and Soluble Nitrogen in Lettuce Seedlings
Summ1ary. Protein and soluble nitrogen distribution in different parts of lettuce seedling was studied in light and darkness and in presence and absence of gibberellic acid. In dark, applied gibberellic acid failed to show any marked effect on the nitrogen changes in lettuce. Light inhibits translocation of nitrogen reserves from the cotyledons. Gibberellic acid reverses the light inhibition of...
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ژورنال
عنوان ژورنال: South African Journal of Botany
سال: 2002
ISSN: 0254-6299
DOI: 10.1016/s0254-6299(15)30408-7