Journal of Stress Physiology &
Biochemistry, Vol.
8 No. 4
2012, pp. 302-321 ISSN 1997-0838
Original Text Copyright (cc) 2012 by Islam, Berrios
ORIGINAL
ARTICLE
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QueryDate : 2016-12-24
Cites : 1
Physiological behaviors and
recovery responses of four galician grapevine (Vitis vinifera L.) cultivars under
water stress
Islam M. T.*, Berrios J. G.
Departamento
De Produccion Vexetal, Escuela Politecnica Superior. S/N 27007, Campus
De Lugo. Universidade De Santiago De Compostela, Spain.
*E-Mail: mdtorikul.islam@rai.usc.es
Received October 12, 2012
Gas exchange parameters and
chlorophyll fluorescence of four pot grown Galician grapevines (Vitis vinifera L. cv. Albariņo,
Brancellao, Godello and Treixadura) were examined under different
levels of water stress in greenhouse. After extreme stress, gas
exchange recovery responses were evaluated. Average ΨPD for control and
stressed plants were -0.4 MPa and -1.45 MPa respectively. All varieties
showed gradual declining of all gas exchange parameters (gs, E and A)
with increasing of stress periods. Under stressed conditions, Albariņo
and Godello showed higher CO2 assimilation rate. At the end of stress
period leaf defoliation was found in Albariņo and Brancellao. Gas
exchange recovery was higher for both Godello and Treixadura. A better
response of auxiliary bud recovery was present in Albariņo than in
Brancellao. Close correlations between water stress and gas exchange
parameters were found and it varies on genotype. Albariņo, Godello and
Treixadura followed same diurnal patterns of gas exchange rate for
control and stressed plant respectively. Diurnal pattern of CO2
assimilation rate of all tested varieties followed gs and E. Only
Brancellao showed treatment effect on mid-day Fv/Fm. Among four
varieties photoinhibition was only found in Brancellao. At stressed
condition physiological responses of grapevines were genotype depended.
Key
words: Vitis vinifera L.; water stress; CO2 assimilation
rate; chlorophyll fluorescence
