Impact of Local Damage on Transpiration of Pea Leaves at Various Air Humidity

Local damages induce a wide spectrum of functional responses in intact parts of the plant, including changes in transpiration and CO 2 assimilation, which may be associated with propagating variation potential (VP). In the present work carried out on pea ( Pisum sativum L.) plants, an analysis of th...

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Bibliographic Details
Published in:Russian journal of plant physiology 2019, Vol.66 (1), p.87-94
Main Authors: Yudina, L. M., Sherstneva, O. N., Mysyagin, S. A., Vodeneev, V. A., Sukhov, V. S.
Format: Article
Language:English
Subjects:
Assimilation
Biomedical and Life Sciences
Carbon dioxide
Correlation analysis
Dependence
Elevation
Humidity
Impact analysis
Impact damage
Leaves
Life Sciences
Pisum sativum
Plant growth
Plant Physiology
Plant Sciences
Research Papers
Stomata
Transpiration
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Summary:Local damages induce a wide spectrum of functional responses in intact parts of the plant, including changes in transpiration and CO 2 assimilation, which may be associated with propagating variation potential (VP). In the present work carried out on pea ( Pisum sativum L.) plants, an analysis of the influence of local burn leading to generation of VP on transpiration and CO 2 assimilation under conditions of different air humidity was conducted. It was shown that VP induced multiphase changes in these physiological functions in intact pea leaf, including rapid lowering their parameters, slow elevation of them, and prolonged dropping transpiration and assimilation. Analysis of the impact of air humidity on these processes showed that quick and long lowering transpiration was significantly suppressed under the conditions of high humidity, while slowly increasing transpiration hardly depended on air humidity. Dependence of VP-induced CO 2 assimilation response on air humidity exhibited a similar character. Additional correlation analysis of amplitudes of VP-induced transpiration and CO 2 assimilation changes showed that prolonged stomata closing may be the mechanism of long-term lowering assimilation of intact leaves after the action of local burn. In general, it was established that the VP-induced transpiration response is a complex combination of activation and suppression of transpiration, and the contribution of different components to the observed responses depends on air humidity.
ISSN:1021-4437
1608-3407
DOI:10.1134/S1021443719010163