Effect of high temperature on photosynthesis and transpiration of sweet corn (Zea mays L. var. rugosa)

Title:

Effect of high temperature on photosynthesis and transpiration of sweet corn (Zea mays L. var. rugosa)

Creator:

Ben-Asher, J., Garcia y Garcia, A., and Hoogenboom, G.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:afc2f94a-614f-4bb5-99e9-b690ed20aece
uuid:afc2f94a-614f-4bb5-99e9-b690ed20aece
issn:0300-3604
doi:10.1007/s11099-008-0100-2

Subject:

maize, quasi stem conductance, transpiration rate, vapor pressure deficit, and water use efficiency

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Four temperature treatments were studied in the climate controlled growth chambers of the Georgia Envirotron: 25/20, 30/25, 35/30, and 40/35 °C during 14/10 h light/dark cycle. For the first growth stage (V3-5), the highest net photosynthetic rate (PN) of sweet corn was found for the lowest temperature of 28-34 µmol m-2 s-1 while the PN for the highest temperature treatment was 50-60 % lower. We detected a gradual decline of about 1 P N unit per 1 °C increase in temperature. Maximum transpiration rate (E) fluctuated between 0.36 and 0.54 mm h-1 (≈5.0-6.5 mm d-1) for the high temperature treatment and the minimum E fluctuated between 0.25 and 0.36 mm h-1 (≈3.5-5.0 mm d-1) for the low temperature treatment. Cumulative CO2 fixation of the 40/35 °C treatment was 33.7 g m-2 d-1 and it increased by about 50 % as temperature declined. The corresponding water use efficiency (WUE) decreased from 14 to 5 g(CO2) kg-1(H2O) for the lowest and highest temperature treatments, respectively. Three main factors affected WUE, PN, and E of Zea: the high temperature which reduced PN, vapor pressure deficit (VPD) that was directly related to E but did not affect PN, and quasi stem conductance (QC) that was directly related to PN but did not affect E. As a result, WUE of the 25/20 °C temperature treatment was almost three times larger than that of 40/35 °C temperature treatment. and J. Ben-Asher, A. Garcia y Garcia, G. Hoogenboom.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

595-603

Source:

Photosynthetica | 2008 Volume:46 | Number:4

Harvested from:

CDK

Metadata only:

false