Changes in the temperature-dependency of the photosynthetic response to chloroplast CO2 concentrations of outdoor-grown Vitis vinifera cv. Shiraz vines with a mid-season crop removal

2020 ◽  
Vol 169 ◽  
pp. 103914
Author(s):  
Dennis H. Greer
Keyword(s):  
Vitis Vinifera ◽  
Temperature Dependency ◽  
Photosynthetic Response ◽  
Co2 Concentrations

Modelling seasonal changes in the temperature-dependency of CO2 photosynthetic responses in two Vitis vinifera cultivars

2018 ◽  
Vol 45 (3) ◽  
pp. 315 ◽  
Author(s):  
Dennis H. Greer
Keyword(s):  
Vitis Vinifera ◽  
Seasonal Changes ◽  
Vitis Vinifera L ◽  
Temperature Dependency ◽  
Seasonal Climate ◽  
Average Temperature ◽  
Internal Co2 ◽  
Photosynthetic Responses ◽  
Temperature Optima ◽  
Cultivar Difference

A study of photosynthesis of two grapevine cultivars, Vitis vinifera L. cv. Chardonnay and cv. Merlot in relation to the seasonal climate and internal CO2 (Ci) concentration at leaf temperatures from 15 to 45°C was undertaken. Average rates of photosynthesis at saturating CO2 concentrations and all leaf temperatures were higher in Merlot compared with Chardonnay leaves. This was attributable to higher rates of ribulose 1,5-bisphosphate (RuBP) carboxylation (Vcmax) and regeneration (Jmax) in Merlot leaves. These differences in photosynthesis were extended as the season progressed, partly because rates of RuBP carboxylation and regeneration of Chardonnay leaves declined markedly whereas rates for Merlot leaves remained high. Although there was no cultivar difference in the seasonal average temperature optima for assimilation (34°C) and the underlying metabolism (40°C for Vcmax and 35°C for Jmax), for temperatures above 35°C, the Merlot leaves had 50% higher rates. Across the season, activation energies of the temperature sensitivity of Vcmax and Jmax declined in response to the seasonal climate but were consistently lower in Merlot than Chardonnay. This suggested some apparent differences in the biochemistry occurred between the two cultivars that limited assimilation in Chardonnay leaves, especially at higher temperatures, but did not limit assimilation in Merlot leaves.

Photosynthetic response to variation in CO2 concentrations and temperature of four broad-leaved trees in Beijing region

2008 ◽  
Vol 3 (3) ◽  
pp. 364-368
Author(s):  
Zhibo Ma ◽  
Shengqing Shi ◽  
Qinyan Ma ◽  
Yutao Wang ◽  
Xingliang Liu
Keyword(s):  
Photosynthetic Response ◽  
Co2 Concentrations

An Analysis of Photosynthetic Response to Salt Treatment in Vitis vinifera

1981 ◽  
Vol 8 (3) ◽  
pp. 359 ◽  
Author(s):  
RR Walker ◽  
E Torokfalvy ◽  
NS Scott ◽  
PE Kriedemann
Keyword(s):  
Vitis Vinifera ◽  
Shoot Growth ◽  
Specific Activity ◽  
Photochemical Efficiency ◽  
Stress Relief ◽  
Vitis Vinifera L ◽  
Photosynthetic Response ◽  
Salt Treatment ◽  
Bisphosphate Carboxylase ◽  
Fraction I

Rooted cuttings of grapevines (Vitis vinifera L. cv. Sultana; syn. Thompson Seedless) were grown under glasshouse conditions and supplied with dilute nutrient solution containing either 0 or 90 mM of added NaCl. Growth and photosynthetic response to salt treatment and subsequent recovery were followed over 80 days. Shoot growth and photosynthesis were reduced by salt treatment. At relatively low concentrations of leaf chloride (< c. 150 mM, on a tissue water basis), photosynthetic reduction was largely due to increased stomatal resistance. Internal disturbances were involved at higher leaf Cl- concentrations (> c. 150 mM) and included an apparent reduction in photochemical efficiency and a faster rate of photorespiration. Levels of fraction I protein, and specific activity of ribulose-1,5-bisphosphate carboxylase measured in vitro, were not reduced by salt treatment. Vines showed remarkable adaptation to salinity insofar as leaves maintained positive turgor despite leaf Cl- concentrations exceeding 300 mM, implying osmotic adjustment. Cessation of salt treatment led to an immediate decrease in leaf Cl-, a promotion of shoot growth and a progressive recovery in photosynthesis accompanied by a marked but not necessarily concurrent reduction in both stomatal and internal resistances. Leaves tolerated Cl- levels up to 200 mM (under glasshouse conditions) without sustaining permanent reduction in photosynthetic activity. New shoots formed subsequent to stress relief are not a prerequisite for Cl- retranslocation from mature leaves as decapitation at the time of stress relief did not prevent attenuation of leaf Cl- or recovery in photosynthesis.

scholarly journals Foliar exposure of grapevine (Vitis vinifera L.) to TiO2 nanoparticles under field conditions: Photosynthetic response and flavonol profile

2018 ◽  
Vol 56 (4) ◽  
pp. 1378-1386 ◽  
Author(s):  
P. Teszlak ◽  
M. Kocsis ◽  
A. Scarpellini ◽  
G. Jakab ◽  
L. Korosi
Keyword(s):  
Vitis Vinifera ◽  
Field Conditions ◽  
Vitis Vinifera L ◽  
Photosynthetic Response ◽  
Flavonol Profile

Photosynthetic response of P-deficient Gracilaria tenuistipitata under two different phosphate treatments

1996 ◽  
Vol 96 (4) ◽  
pp. 601-606 ◽  
Author(s):  
Maria J. Garcia-Sanchez ◽  
Jose A. Fernandez ◽  
F. Xavier Niell
Keyword(s):  
Photosynthetic Response ◽  
Gracilaria Tenuistipitata
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