Effect of Benzylaminopurine on Rehydration of Bean Plants after Water Stress

Rulcová, J.; Pospíšilová, Jana

doi:10.1023/a:1017922421606

Cited by 50 publications

(20 citation statements)

References 30 publications

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“…External application of CKs increased the concentration of endogenous zeatin and reduced the negative eff ects of water defi cit on chlorophyll content and photosynthetic activity; the recovery of stomatal conductance and net photosynthesis was also improved after rehydration in maize (Zea mays L.) and bean (Phaseolus vulgaris L.) plants (Blackman and Davies, 1983;Metwally et al, 1997;Rulcová and Pospíšilová, 2001). Transgenic creeping bentgrass overexpressing the gene (ipt) controlling CK synthesis also exhibited rapid recovery in growth from drought stress on rewatering (Merewitz et al, 2011).…”

Section: Growth and Physiological Recovery Of Kentucky Bluegrass Frommentioning

confidence: 99%

Growth and Physiological Recovery of Kentucky Bluegrass from Drought Stress as Affected by a Synthetic Cytokinin 6‐Benzylaminopurine

Wang

Huang

2012

Crop Science

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Cytokinins (CKs) influence plant adaptation to environmental stresses. The objectives of this study were to (i) examine effects of foliar application of a synthetic GK, 6-benzylaminopurine (6-BA), on postdrought recovery and (ii) determine physiological factors involved in postdrought recovery affected by GKs in a perennial grass species. Kentucky bluegrass {Poa pratensis L.) cultivars Midnight (drought tolerant) and Brilliant (drought sensitive) were subjected to drought by withholding irrigation for 15 d and were then rewatered for 10 d in growth chambers. Plants were treated with 25 |JM 6-BA at the time of rewatering. Applying 6-BA significantly increased endogenous zeatin riboside and isopentenyl adenosine content and decreased abscisic acid (ABA) content in both cultivars previously exposed to drought stress. Foliar 6-BA application enhanced physiological recovery of plants from drought stress, as demonstrated by the increased leaf relative water content and visual turf quality and decreased electrolyte leakage. The 6-BA application also significantly improved photosynthetic recovery from drought, as manifested by the increase in net photosynthetic rate, transpiration rate, and stomatal conductance. Foliar application of 6-BA promoted the production of new tillers. Postdrought recovery affected by 6-BA application was more pronounced in Midnight than Brilliant, probably because the latter experiences a more sustained leaf water deficit. Our results suggested that GK-enhanced postdrought recovery of Kentucky bluegrass, particularly in the drought-tolerant eultivar, was associated with the alteration of GK:ABA balance and promotion of stomatal reopening, resumption of photosynthesis, and new tiller formation on rewatering.

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Section: Growth and Physiological Recovery Of Kentucky Bluegrass Frommentioning

confidence: 99%

Growth and Physiological Recovery of Kentucky Bluegrass from Drought Stress as Affected by a Synthetic Cytokinin 6‐Benzylaminopurine

Wang

Huang

2012

Crop Science

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“…This confirms the results of observations by Luquez et al [36] who reported a significantly larger number of stomata on the lower epidermis of soybean leaves. The number of stomata may be to a large extent determined by the concentration of a given hormone [12,32].…”

Section: Discussionmentioning

confidence: 99%

“…Exogenous growth regulators used for plants can influence the physiological activity and plant productivity in a number of ways, which depends on the type of growth regulator, its concentration and the individual characteristics of the plant [8][9][10][11][12][13][14]. Some authors report increased photosynthesis and transpiration in various species after using auxin, e.g.…”

Section: Introductionmentioning

confidence: 99%

Changes in the physiological activity of soybean (Glycine max L. Merr.) under the influence of exogenous growth regulators

Nowak

Wróbel

2015

Acta Agrobot

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In a two-year pot experiment (2008–2009) conducted at the Vegetation Hall, West Pomeranian University of Technology in Szczecin, we investigated the influence of exogenous growth regulators, i.e. indole-3-butyric acid (IBA) and 6-benzylaminopurine (BAP) and their mixture, on the activity of gas exchange and selected physiological features of soybeans (Glycine max L. Merr.). The experimental factors included the following Polish soybean cultivars: ‘Aldana’, ‘Progres’ and ‘Jutro’. During plant growth, CO2 assimilation (A), transpiration rate (E), stomatal conductance (gs), and substomatal CO2 concentration (ci) were determined. Two soybean cultivars, i.e. ‘Jutro’ and ‘Progres’, showed a significant increase in the intensity of assimilation and transpiration after using all kinds of growth regulators as compared with the control plants. It was found that the ‘Jutro’ cultivar, after using a mixture of growth regulators (IBA + BAP), was characterized by the significantly highest CO2 assimilation (A) and transpiration (E) as well as the highest stomatal conductance (gs). The ‘Aldana’ cultivar, on the other hand, responded by a significant reduction in the transpiration rate, stomatal conductance and subsomatal CO2 concentration. The spraying of the plants with exogenous growth regulators had a significant influence on the increase in the number of stomata and stomatal pore length, mostly on the lower epidermis of the lamina. It was also found that plants from the ‘Jutro’ and ‘Aldana’ cultivars sprayed with IBA and IBA + BAP were characterized by the highest yield, as compared with the control plants. In the case of the ‘Jutro’ cultivar, after using the growth regulators, a positive correlation was observed between the assimilation and transpiration rates and the length of stomata, which in consequence produced increased yields.

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“…The response of plants to exogenous osmoprotectant application is dependant on application rate (Pospíšilová 2003). In previous experiments, application of low concentrations (1 µmol/L) of an osmoprotectant to water stressed bean (Phaseolus vulgaris L.) plants improved recovery, while higher concentrations (10 µmol/L) had a negative impact (Rulcová 2000;Rulcová and Pospíšilová 2001). It is possible that GB also has a concentration threshold, above which there is no effect, or potentially even a negative effect, and the higher concentration (5.0 kg/ha) of GB used in experiment 2 may have surpassed this threshold.…”

Section: Discussionmentioning

confidence: 99%

Effect of surface applied glycine betaine on herbage production and quality of perennial ryegrass - white clover pastures

Lee

Elborough

Catto

et al. 2008

Aust. J. Exp. Agric.

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Osmoprotectants have been reported to reduce the detrimental effects of various environmental stresses in many different plant species. However, there is little research available concerning pasture species. Two experiments were undertaken with the aim of quantifying the effect of surface applications of exogenous glycine betaine (GB) on herbage production and quality of perennial ryegrass (Lolium perenne L.)–white clover (Trifolium repens L.) pastures during periods of moisture stress and cold temperatures over 2 years. Pastures fertilised with GB were compared with unfertilised pastures and pastures fertilised with nitrogen (N). Rates of 0.5, 1.0 and 1.5 kg GB/ha.defoliation were applied in experiment 1 and 5 kg GB/ha.defoliation was applied in experiment 2. Surface applications of GB did not significantly affect herbage production relative to unfertilised pastures; herbage yields averaged 12 248 and 12 693 kg DM/ha over 11 months in experiment 1, and 7253 and 7177 kg DM/ha over 6 months during summer and autumn in experiment 2, for the unfertilised control and GB, respectively. During both experiments, herbage quality parameters were not affected by GB application, although the proportion of white clover in the sward between summer and winter during experiment 1 was greater (P < 0.01) in plots treated with GB than in untreated plots. Application of N fertiliser increased (P < 0.001) herbage production, but did not consistently affect herbage quality. The failure of surface applications of exogenous GB to improve the herbage production or quality of perennial ryegrass–white clover pastures suggests that it is not an appropriate method to enhance plant tolerance to environmental stress at the concentrations applied in these studies.

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Effect of Benzylaminopurine on Rehydration of Bean Plants after Water Stress

Cited by 50 publications

References 30 publications

Growth and Physiological Recovery of Kentucky Bluegrass from Drought Stress as Affected by a Synthetic Cytokinin 6‐Benzylaminopurine

Growth and Physiological Recovery of Kentucky Bluegrass from Drought Stress as Affected by a Synthetic Cytokinin 6‐Benzylaminopurine

Changes in the physiological activity of soybean (Glycine max L. Merr.) under the influence of exogenous growth regulators

Effect of surface applied glycine betaine on herbage production and quality of perennial ryegrass - white clover pastures

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