Effect of exogenous application of growth regulators on the physiological parameters and the yield of winter wheat under drought stress

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F14%3A00521369" target="_blank" >RIV/86652079:_____/14:00521369 - isvavai.cz</a>

Alternative codes found

RIV/62156489:43210/14:00229727

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Effect of exogenous application of growth regulators on the physiological parameters and the yield of winter wheat under drought stress

Original language description

The field trial aimed to evaluate the effect of different growth regulators in winter wheat under growth stress was conducted in 2013/2014. Within this experiment following growth regulators and fungicide with growth regulation effect were used: Retacel extra R68 (chlormequat chloride 720 g/l), Moddus (trinexapac-ethyl 250 g/l), Cerone (ethephon 480 g/l), Amistar (strobulirin 250 g/l). These growth regulators were applied at growth stages between BBCH 31 and BBCH 59. The aim of the experiment was to determine the impact of these regulators on the growth, development and yield of winter wheat when simulating the drought stress using experimental rain-out shelters. The attention was paid to assess the effect of exogenous application of growth regulators on the physiology and the yield of selected varieties of winter wheat under drought stress. From our preliminary results it can be concluded that almost all growth regulators increase the rate of CO2 assimilation and the stomatal conductance. Definitely positive effect on water use efficiency was found in fungicide treatment with growth regulation effect azoxystrobin. Under drought stress the decrease of chlorophyll content in leaves was found. Growth regulators CCC and trinexapac mitigate the decline of chlorophyll content caused by drought in the upper leaves but rather increased the impact in older (lower) leaves. Fungicide azoxystrobin alleviates the decrease of chlorophyll caused by drought in all leaves. The results show that all regulators increased yield, which demonstrate a positive effect under dry conditions because the vegetation season was very dry and lodging did not occur. Furthermore, the most pronounced mitigation of drought stress was found for strobilurin and partly also trinexapac. Results of field experiments can contribute to mitigating the impact of drought on yield formation and quality of winter wheat production in the realization of biological potential of wheat genotypes.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

40101 - Agriculture

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Mendelenet 2014

ISBN

978-80-7509-174-1

ISSN

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e-ISSN

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Number of pages

5

Pages from-to

442-446

Publisher name

Mendelova univerzita

Place of publication

Brno

Event location

Brno

Event date

Nov 19, 2014

Type of event by nationality

CST - Celostátní akce

UT code for WoS article

000362518300084