Phytochrome Transformation and Action in Seeds of Rumex crispus L. during Secondary Dormancy
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چکیده
منابع مشابه
Phytochrome Transformation and Action in Seeds of Rumex crispus L. during Secondary Dormancy.
Promotion of germination by red light fails after prolonged dark imbibition of Rumex crispus L. seeds, indicative of a secondary dormancy. The degree and rate of inception of the dormancy increases with increasing temperature. Following establishment of the dormancy, germination response to red light can be restored by either prolonged cold treatment or brief high temperature shifts. Loss of ph...
متن کاملAction of Phytochrome During Prechilling of Amaranthus retroflexus L. Seeds.
Dark germination of Amaranthus retroflexus L. seeds at 35 degrees increased after several days of prechilling at 20 degrees or lower. Irradiation with far-red light for short periods during the early hours of a prechilling period at 10 degrees inhibited subsequent dark germination at 35 degrees . The inhibition was completely reversible with red light. Far-red irradiation in the latter part of ...
متن کاملDose-Response Analysis of Factors Involved in Germination and Secondary Dormancy of Seeds of Sisymbrium officinale: I. Phytochrome.
The germination of seeds of Sisymbrium officinale is light- and nitrate dependent. A close interaction between the effects of light and nitrate on germination has been reported previously (HWM Hilhorst, CM Karssen [1988] Plant Physiol 86: 591-597). In this study, a detailed dose-response analysis of the light-induced germination during induction of secondary dormancy is presented. Germination i...
متن کاملDependence of phytochrome action in seeds on membrane organization.
Germination of Amaranthus retroflexus L. seeds imbibed at 40 C is enhanced by establishing the active form of phytochrome before a reduction in temperature to <32 C. The half-time for effectiveness of the lower temperature is about 8 min at 15 C. Isolated membrane fragments of A. retroflexus seeds associated with the fluorescent probe 1,8-anilino-naphthalene sulfonate (ANS) increase in structur...
متن کاملRehydration of Phytochrome in Imbibing Seeds of Amaranthus retroflexus L.
It is commonly recognized that light-sensitive seeds require a period of imbibition before full promotion of germination by a light stimulus can be attained. Yet little work describes the nature of these preliminary events. Of the several major limitations that may be involved, clearly the rehydration (or activation) of phytochrome and the system with which it interacts are the chief ones to co...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1973
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.52.5.475