Flowering Response of Pharbitis nil to Agents Affecting Cytoplasmic pH
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چکیده
منابع مشابه
Carbon Dioxide and Flowering in Pharbitis nil Choisy.
The effects of photoperiod on floral and vegetative development of Pharbitis nil were modified by atmospheric CO(2) concentrations maintained during plant growth. Short day (SD) photoperiods caused rapid flowering in Pharbitis plants growing in 0.03 or 0.1% CO(2), while plants in long day (LD) conditions remained vegetative. At 1 or 5% CO(2), however, flower buds were developed under both the S...
متن کاملA Semidian Rhythm in the Flowering Response of Pharbitis nil to Far-Red Light: II. The Involvement of Phytochrome.
The semidian ( approximately 12 h) periodicity in the effect of far-red (FR) interruptions of the light period preceding inductive darkness on flowering in Pharbitis nil appears to be mediated by phytochrome: (a) promotion by interruptions 2 hours before inductive darkness (-2 hours) and inhibition at -8 hours are greater the higher the proportion of FR/R+FR during the interruption; (b) brief F...
متن کاملGibberellins in Relation to Growth and Flowering in Pharbitis nil Chois.
Flowering can be modified by gibberellins (GAs) in Pharbitis nil Chois. in a complex fashion depending on GA type, dosage, and the timing of treatment relative to a single inductive dark period. Promotion of flowering occurs when GAs are applied 11 to 17 hours before a single inductive dark period. When applied 24 hours later the same GA dosage is inhibitory. Thus, depending on their activity a...
متن کاملIsolation of a CONSTANS ortholog from Pharbitis nil and its role in flowering.
The short-day plant Pharbitis nil is a model plant for the study of photoperiodic control of floral initiation. Flower formation can be induced at the cotyledon stage by a single long night of at least 14 h in duration. Using differential display of mRNA we identified a P. nil ortholog of the Arabidopsis CONSTANS (CO) gene, which will be referred to as PnCO. Expression of PnCO was high after a ...
متن کاملA Semidian Rhythm in the Flowering Response of Pharbitis nil to Far-Red Light: I. Phasing in Relation to the Light-Off Signal.
Evidence is presented of an endogenous rhythm in flowering response to far-red (FR) irradiation, with a period of about 12 h (hence semidian rhythm), which persists through at least three cycles in constant conditions of continuous light at 27 degrees C and has a marked influence on the flowering response in Pharbitis nil to a subsequent inductive dark period. The phase of the rhythm is not inf...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1990
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.94.1.114