Cytokinin activity increases stomatal density and transpiration rate in tomato

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Cytokinin activity increases stomatal density and transpiration rate in tomato

Previous studies on cytokinin (CK) and drought have suggested that the hormone has positive and negative effects on plant adaptation to restrictive conditions. This study examined the effect of CK on transpiration, stomatal activity, and response to drought in tomato (Solanum lycopersicum) plants. Transgenic tomato plants overexpressing the Arabidopsis thaliana CK-degrading enzyme CK oxidase/de...

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Effect on shoot water relations, and cytokinin and abscisic acid levels of inducing expression of a gene coding for isopentenyltransferase in roots of transgenic tobacco plants.

Heat shock (HS) at 40 degrees C was given to the root system of Nicotiana tabacum wild type (WT) and to HSIPT transgenic plants transformed with the bacterial cytokinin biosynthesis gene isopentenyltransferase (ipt) cloned behind the heat shock 70 promoter from Drosophila melanogaster. HS increased cytokinin concentrations in roots and leaves of transgenic plants. The effect was smaller in WT p...

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Cytokinin regulates compound leaf development in tomato.

Leaf shape diversity relies on transient morphogenetic activity in leaf margins. However, how this morphogenetic capacity is maintained is still poorly understood. Here, we uncover a role for the hormone cytokinin (CK) in the regulation of morphogenetic activity of compound leaves in tomato (Solanum lycopersicum). Manipulation of CK levels led to alterations in leaf complexity and revealed a un...

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Separating active and passive influences on stomatal control of transpiration.

Motivated by studies suggesting that the stomata of ferns and lycophytes do not conform to the standard active abscisic acid (ABA) -mediated stomatal control model, we examined stomatal behavior in a conifer species (Metasequoia glyptostroboides) that is phylogenetically midway between the fern and angiosperm clades. Similar to ferns, daytime stomatal closure in response to moderate water stres...

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relationships among grain yield, transpiration rate and stomatal length in seven corn cultivars under salt stress condition

salt stress is a factor limiting crop growth and productivity around the world. developing salt tolerant cultivars using desired plant features has been considered as a way to cope with the problem. in this study, a factorial experiment was used in order to determine the effects of salt stress on stomatal length at abaxial and adaxial leaf surfaces, relative water content (rwc) and transpiratio...

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ژورنال

عنوان ژورنال: Journal of Experimental Botany

سال: 2016

ISSN: 0022-0957,1460-2431

DOI: 10.1093/jxb/erw398