Variation in stomatal behaviour and gas exchange between mid-morning and mid-afternoon of north–south oriented grapevines (Vitis vinifera L. cv. Tempranillo) at different levels of soil water availability

2006 ◽  
Vol 108 (2) ◽  
pp. 173-180 ◽  
Author(s):  
E. Cuevas ◽  
P. Baeza ◽  
J.R. Lissarrague
Keyword(s):  
Gas Exchange ◽  
Vitis Vinifera ◽  
Soil Water ◽  
Water Availability ◽  
Soil Water Availability ◽  
Vitis Vinifera L ◽  
Stomatal Behaviour ◽  
Different Levels

Influence of Seasonal Variations in Soil Water Availability on Gas Exchange of Tropical Canopy Trees

Biotropica ◽  
2012 ◽  
Vol 45 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Clément Stahl ◽  
Benoit Burban ◽  
Fabien Wagner ◽  
Jean-Yves Goret ◽  
Félix Bompy ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Soil Water ◽  
Water Availability ◽  
Seasonal Variations ◽  
Soil Water Availability ◽  
Canopy Trees

scholarly journals Effect of soil water availability on gas exchange in young trees of Eucalyptus grandis W. Hill ex Maiden

2017 ◽  
Vol 66 (4) ◽  
pp. 549-557
Author(s):  
María Sara Mejía de Tafur ◽  
Néstor Miguel Riaño Herrera ◽  
John Byron Urrego Mesa ◽  
Dora Mónica Ibarra Espinosa ◽  
Claudia Marcela Zapata Duque
Keyword(s):  
Gas Exchange ◽  
Soil Water ◽  
Water Availability ◽  
Eucalyptus Grandis ◽  
Soil Water Availability

Hydraulic and chemical signalling in the regulation of stomatal conductance and plant water use in field grapevines growing under deficit irrigation

2008 ◽  
Vol 35 (7) ◽  
pp. 565 ◽  
Author(s):  
M. Lucília Rodrigues ◽  
Tiago P. Santos ◽  
Ana P. Rodrigues ◽  
Claudia R. de Souza ◽  
Carlos M. Lopes ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Use ◽  
Water Availability ◽  
Dominant Role ◽  
Xylem Sap ◽  
Soil Water Availability ◽  
Vitis Vinifera L ◽  
Plant Water ◽  
Chemical Signalling ◽  
Plant Water Use

Effects of irrigation strategies on stomata and plant water use were studied in field-grown grapevines (Vitis vinifera L.). We assessed the importance of root-derived chemical signals vs. hydraulic signalling in stomatal regulation. The experiment included two treatments with the same water added to the soil (50% ETc) applied either to the whole root system (DI) or to half of the roots, alternating irrigation side every 15 days (PRD). Well-watered plants (FI) (100% ETc) and non-irrigated grapevines (NI) were also studied. Partial stomata closure occurred in both PRD and DI plants. [ABA] of xylem sap remained constant during the day and was maintained throughout the season, with higher values in NI plants. Xylem sap pH was not affected by soil water availability. A positive correlation between ψpd and maximum g s was found, indicating that grapevine stomata strongly respond to plant water status. In contrast, ABA did not explain stomatal control at veraison. At mid-ripening g s was significantly correlated with ABA, apparently interacting with the rise in xylem sap pH. Therefore, our data suggest that hydraulic feedback and feed-forward root-to-shoot chemical signalling mechanisms might be involved in the control of stomata in response to decreased soil water availability, hydraulic signals playing the dominant role.

scholarly journals Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability

2011 ◽  
Vol 91 (6) ◽  
pp. 1011-1025 ◽  
Author(s):  
Eduardo Leguizamón ◽  
Marcos Yanniccari ◽  
Juan Guiamet ◽  
Horacio Acciaresi
Keyword(s):  
Zea Mays ◽  
Gas Exchange ◽  
Soil Water ◽  
Water Availability ◽  
Root Length ◽  
Competitive Ability ◽  
Sorghum Halepense ◽  
Soil Water Availability ◽  
Length Ratio ◽  
Root Length Ratio

Leguizamón, E. S., Yanniccari, M. E., Guiamet, J. J. and Acciaresi, H. A. 2011. Growth, gas exchange and competitive ability of Sorghum halepense populations under different soil water availability. Can. J. Plant Sci. 91: 1011–1025. Different studies have determined that environmental variation is a key factor determining the outcome of competition within plant communities. Considering the importance of the resource water in non-irrigated lands of Argentina, the aim was to determine the effects of water deficit on relative growth rate (RGR), root length ratio (RLR), gas exchange and competitive ability of Sorghum halepense populations collected in humid and subhumid regions of the Pampa plains. Under semi-controlled conditions, we compared plants of seven S. halepense populations subjected to three different levels of soil water availability during 3 wk: Field capacity (FC), 75% FC and drought (D). Moreover, total above-ground biomass of S. halepense and Zea mays plants growing together in competition was determined. It was found that those plants collected in humid or subhumid regions had greater RGR, gas exchange and RLR under FC and D, respectively. Zea mays achieved a higher competitive ability than S. halepense under FC, but plants collected in humid regions out-competed the crop when grown at 75% FC. Sorghum halepense plants collected in subhumid regions dominated under D. Root length ratio may have favored the maintenance of high levels of gas exchange and also high RGR, thus contributing to sustain a competitive hierarchy under soil water stress.

scholarly journals Characterizing Growing Season Length of Subtropical Coniferous Forests with a Phenological Model

Forests ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 95
Author(s):  
Yuan Gong ◽  
Christina L. Staudhammer ◽  
Susanne Wiesner ◽  
Gregory Starr ◽  
Yinlong Zhang
Keyword(s):  
Climate Change ◽  
Soil Water ◽  
Prescribed Fire ◽  
Water Availability ◽  
Longleaf Pine ◽  
Growing Season ◽  
Soil Water Availability ◽  
Future Climate Change ◽  
Short Term ◽  
Phenological Model

Understanding plant phenological change is of great concern in the context of global climate change. Phenological models can aid in understanding and predicting growing season changes and can be parameterized with gross primary production (GPP) estimated using the eddy covariance (EC) technique. This study used nine years of EC-derived GPP data from three mature subtropical longleaf pine forests in the southeastern United States with differing soil water holding capacity in combination with site-specific micrometeorological data to parameterize a photosynthesis-based phenological model. We evaluated how weather conditions and prescribed fire led to variation in the ecosystem phenological processes. The results suggest that soil water availability had an effect on phenology, and greater soil water availability was associated with a longer growing season (LOS). We also observed that prescribed fire, a common forest management activity in the region, had a limited impact on phenological processes. Dormant season fire had no significant effect on phenological processes by site, but we observed differences in the start of the growing season (SOS) between fire and non-fire years. Fire delayed SOS by 10 d ± 5 d (SE), and this effect was greater with higher soil water availability, extending SOS by 18 d on average. Fire was also associated with increased sensitivity of spring phenology to radiation and air temperature. We found that interannual climate change and periodic weather anomalies (flood, short-term drought, and long-term drought), controlled annual ecosystem phenological processes more than prescribed fire. When water availability increased following short-term summer drought, the growing season was extended. With future climate change, subtropical areas of the Southeastern US are expected to experience more frequent short-term droughts, which could shorten the region’s growing season and lead to a reduction in the longleaf pine ecosystem’s carbon sequestration capacity.

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