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Titolo:
Transpiration efficiency and carbon-isotope discrimination of grapevines grown under well-watered conditions in either glasshouse or vineyard
Autore:
Gibberd, MR; Walker, RR; Blackmore, DH; Condon, AG;
Indirizzi:
Cooperat Res Ctr Viciculture, Glen Osmond, SA 5064, Australia Cooperat ResCtr Viciculture Glen Osmond SA Australia 5064 064, Australia CSIRO Plant Ind, Hort Unit, Merbein, Vic 3505, Australia CSIRO Plant Ind Merbein Vic Australia 3505 , Merbein, Vic 3505, Australia CSIRO Plant Ind, Canberra, ACT 2601, Australia CSIRO Plant Ind Canberra ACT Australia 2601 Canberra, ACT 2601, Australia
Titolo Testata:
AUSTRALIAN JOURNAL OF GRAPE AND WINE RESEARCH
fascicolo: 3, volume: 7, anno: 2001,
pagine: 110 - 117
SICI:
1322-7130(2001)7:3<110:TEACDO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
GENOTYPIC VARIATION; GAS-EXCHANGE; LEAF-AREA; PEANUT; WHEAT; PLANT; SUNFLOWER; DEFICIT; YIELD;
Keywords:
Vitis vinifera; water-use efficiency; leaf gas exchange; photosynthesis; stomatal conductance; carbon isotope discrimination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Gibberd, MR Cooperat Res Ctr Viciculture, POB 154, Glen Osmond, SA 5064, Australia Cooperat Res Ctr Viciculture POB 154 Glen Osmond SA Australia 5064
Citazione:
M.R. Gibberd et al., "Transpiration efficiency and carbon-isotope discrimination of grapevines grown under well-watered conditions in either glasshouse or vineyard", AUST J GR W, 7(3), 2001, pp. 110-117

Abstract

This paper describes variation in transpiration efficiency 'W' (where W=dry matter produced/water transpired) among grapevine genotypes grown under well-watered conditions in either a glasshouse or a vineyard. Nineteen genotypes were grown in a glasshouse where growth and transpiration were measured. W ranged from 2.5 to 3.4 g dm/kg H2O transpired. Carbon-isotope discrimination (Delta) of laminae dry matter ranged from 20.8 to 22.7 parts per thousand and there was a negative relationship (R-2=0.58) between W and Delta. A large proportion of variation in W could be attributed to variation in stomatal conductance. Genotypic variation in photosynthetic capacity was also an important component of variation in W. In a second experiment, lamina Delta was measured for mature field-grown Shiraz and Chardonnay, grown either on their own roots or grafted to five different rootstocks, and maintained at three sites under well-watered conditions. At all sites and regardless of rootstock, the laminae of Chardonnay had Delta values 1 to 2%. lower than Shiraz. There was also a 1 to 2 parts per thousand variation among the sites. Rootstock variety affected Delta values inconsistently and by a maximum of 0.5 parts per thousand. Leaf gas exchange measurements were performed at a single site on sun-exposed leaves of Chardonnay and Shiraz on eithertheir own roots or 1103 Paulsen, a moderate to high vigour rootstock. There was no significant effect of rootstock on leaf gas exchange and photosynthetic rates did not differ between scion varieties. However, Chardonnay hada 20% lower stomatal conductance and a 1.4-fold higher ratio of CO2 assimilation/H2O transpiration (A/T) indicating a potentially higher W, at a leaflevel, for Chardonnay compared with Shiraz. We conclude that photosynthetic capacity was also higher for Chardonnay. Delta values, predicted from theC-i/C-a ratio calculated from leaf gas exchange measurements, did not differ significantly from measured values for laminae Delta. This similarity for Delta, in conjunction with the fact that the lower Delta of Chardonnay was reflected in a higher A/T ratio, suggests that Delta may be a reliable predictor of comparative W under vineyard conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 09:26:18