Effects of Gibberellic Acid on Stem Apices of Vernalizable Grasses

Roller, Dov; Highkin, H. R.; Caso, O. H.

doi:10.1002/j.1537-2197.1960.tb10622.x

Cited by 14 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6]. Our interpretation is supported by the fact that GA3 treatment of sorghum induces not one but several characteristics of the floral condition in a manner similar to that documented for barley (12) where GA3 promotion of floral initiation is well known (3,7). These characteristics include: (a) both elongation and widening of the apical meristem, (b) the absence of tightly appressed leaf primordia covering the apical dome, (c) the eventual occurrence of blunt lobes rather than obvious leaf primordia on the flanks of the meristem, and (d) development of a constriction below the apical dome.…”

Section: Methodssupporting

confidence: 61%

Genetic Regulation of Development in Sorghum bicolor

Morgan¹,

Quinby²

1987

Plant Physiol.

View full text Add to dashboard Cite

Sorghum bicolor (L.) Moench lines with genetic differences in photoperiod requirement were planted in the field near Plainview, Texas (about 340 northern latitude) around June 1 and treated with gibberellic acid (GA3) solutions applied in the apical leaf whorl. GA3 hastened the date of floral differentiation (initiation). The greatest responses to GA3 were by 90M and 100M, the latest of the genotypes, for which floral initiation dates were hastened an average of 19.5 and 21.7 days, respectively, for the 4 years beginning in 1980. There were very small differences in dates of anthesis between control and GA3-treated plants. Sorghum is a quantitative SD plant (8,10,20,23,26,28). Increasing night length in a 24-h cycle under both natural and growth room conditions hastens flowering. Floral initiation involves differentiation of the vegetative apical meristem into a floral meristem. Floral initiation is hastened by briefexposure to FR2 at the beginning of the dark period (8,26) and by treatment with GA3 (26). The effects of FR and GA3 together are greater than either alone (26).Mutations of genes at four loci that influence the plant's '

show abstract

Section: Methodssupporting

confidence: 61%

Genetic Regulation of Development in Sorghum bicolor

Morgan¹,

Quinby²

1987

Plant Physiol.

View full text Add to dashboard Cite

show abstract

“…We conclude that the Sirael variety does not require vernalization or a short-day photoperiod to transition to the generative stage. According to [57], despite the occurrence of flowering, it is concluded that the role of GA in this phenomenon is restricted to the activation of lateral meristems in the apex. Mironovskaya achieved head-emergence on average a week later than Bezostaya with the same vernalization period of eight weeks [58].…”

Section: Development Of the Growing Pointmentioning

confidence: 99%

Effect of Gibberellic Acid on Growing-Point Development of Non-Vernalized Wheat Plants under Long-Day Conditions

Skalický

Kubeš

Vachová

et al. 2020

Plants

View full text Add to dashboard Cite

The goal of this study was to determine whether the application of gibberellic acid (GA3) to seeds of common wheat varieties with different vernalization and photoperiod requirements affects the transition from vegetative to generative stage. Three varieties of wheat with different photoperiod sensitivities and vernalization were selected for the experiment—the winter varieties, Mironovskaya and Bezostaya, and the spring variety, Sirael. Seeds were treated with different concentrations of GA3 and plants were grown under long-day conditions with monitoring of their photosynthetic activity (Fv/Fm, Pn, E, gs). We monitored the activity of the photosynthetic apparatus by checking the plants to see if they were growing properly. The phenological stages of the wheat species were checked for indications of a transition from the vegetative to the generative stage. Selected concentrations of GA3 had no effect on the compensation of the vernalization process (transition to the generative phase). Chlorophyll fluorescence was one of the factors for monitoring stress. The variety, Bezostaya, is similar to the spring variety, Sirael, in its trends and values. The growth conditions of Bezostaya and Sirael were not affected by the activity of the photosynthetic apparatus. The development of growing points in winter varieties occurred at the prolonged single ridge stage. The spring variety reached the stage of head emergence after sixty days of growth (changes to the flowering phase did not appear in winter wheat). Application of GA3 to the seeds had no effect on the transition of the growing point to the double-ridge generative stage. The present study highlights the priming effect of GA3 on seeds of common wheat varieties with different vernalization and photoperiod requirements as it affected the transition from vegetative to generative stage.

show abstract

The growth of the barley plant

Briggs

1978

Barley

View full text Add to dashboard Cite

Effects of Gibberellic Acid on Stem Apices of Vernalizable Grasses

Cited by 14 publications

References 9 publications

Genetic Regulation of Development in Sorghum bicolor

Genetic Regulation of Development in Sorghum bicolor

Effect of Gibberellic Acid on Growing-Point Development of Non-Vernalized Wheat Plants under Long-Day Conditions

The growth of the barley plant

Contact Info

Product

Resources

About