C3-species Calotropis procera increase specific leaf area and decrease stomatal pore size, alleviating gas exchange under drought and salinity

Xylem pressure potential (ψx), net photosynthesis (A), needle conductance (gn), and transpiration (E) were measured periodically throughout the 1991 growing season on 16 ponderosa pine (Pinusponderosa Dougl. ex Laws.) trees growing in a 23-year-old provenance planting in eastern Nebraska. The trees studied were from four diverse sources: western Montana, northwest South Dakota, southern New Mexico, and central Arizona. In addition to water relations and gas exchange, specific leaf area, stomatal density, and surface to volume ratios were determined on 1-year-old foliage of each tree. Compared with the other seed sources, gas exchange of the South Dakota source was lowest early in the summer, when ψx was generally high, and highest in the late summer, when ψx declined. However, the relation of gn to ψx did not appear to differ among the seed sources. The South Dakota source had lower stomatal density and needle length than the other sources tested. No differences in specific leaf area or surface to volume ratio were observed. Overall, variation in physiology and needle morphology among seed sources of mature ponderosa pine appears to be more subtle than intraspecific variation of seedlings of other species reported in the literature.

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Direct and Indirect Relationships Between Specific Leaf Area, Leaf Nitrogen and Leaf Gas Exchange. Effects of Irradiance and Nutrient Supply

Annals of Botany ◽

10.1006/anbo.2001.1536 ◽

2001 ◽

Vol 88 (5) ◽

pp. 915-927 ◽

Cited By ~ 87

Author(s):

D Meziane

Keyword(s):

Gas Exchange ◽

Leaf Area ◽

Specific Leaf Area ◽

Leaf Gas Exchange ◽

Nutrient Supply ◽

Leaf Nitrogen ◽

Exchange Effects

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Growth and chlorophyll indices in seedlings of Calotropis procera (Aiton) W. T. Aiton submitted to different levels of shading

Revista Agro mbiente On-line ◽

10.18227/1982-8470ragro.v13i0.5602 ◽

2019 ◽

Vol 13 ◽

pp. 164

Author(s):

Francisco Romário Andrade Figueiredo ◽

João Everthon Da Silva Ribeiro ◽

Ester Dos Santos Coêlho ◽

Jackson Silva Nóbrega ◽

Manoel Bandeira De Albuquerque

Keyword(s):

Leaf Area ◽

Chlorophyll A ◽

Specific Leaf Area ◽

Polynomial Regression ◽

Abiotic Factors ◽

Specific Weight ◽

Area Ratio ◽

Leaf Area Ratio ◽

Calotropis Procera ◽

Area Index

Several abiotic factors may influence the growth and development of forest species. Among these, luminosity is one of the most important, because it affects plant physiological processes and control their metabolism. The objective of this study was to evaluate the effect of different shading levels under growth and chlorophyll indices on Calotropis procera plants. The experiment was conducted in a greenhouse in a completely randomized design with 5 treatments (0, 30, 50, 70 and 90% of shading), 8 replicates and one plant per plot. Growth characteristics (leaf area, leaf area index, specific leaf area, leaf area ratio and leaf specific weight) and chlorophyll a, b, total index and chlorophyll a/b ratio were evaluated. The data were submitted to analysis of variance by the F test and in the cases of significance a linear and polynomial regression analysis was performed. Shade levels in the 40% range provide higher leaf area and leaf area index in silk flower plants. The specific leaf area and the leaf area ratio are positively influenced by shading. In shaded environments silk flower plants have reduced chlorophyll indices.

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Faculty Opinions recommendation of Specific leaf area and hydraulic traits explain niche segregation along an aridity gradient in Mediterranean woody species.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.726969026.793525380 ◽

2016 ◽

Author(s):

David Merritt

Keyword(s):

Leaf Area ◽

Specific Leaf Area ◽

Woody Species ◽

Niche Segregation ◽

Aridity Gradient

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Gas Exchange and Leaf Area Characteristics of Four Tall Fescue Selections Differing in Forage Yield 1

Crop Science ◽

10.2135/cropsci1982.0011183x002200040003x ◽

1982 ◽

Vol 22 (4) ◽

pp. 709-711 ◽

Cited By ~ 5

Author(s):

C. J. Cohen ◽

D. O. Chilcote ◽

R. V. Frakes

Keyword(s):

Gas Exchange ◽

Leaf Area ◽

Tall Fescue ◽

Forage Yield

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El Niño-Southern Oscillation affects the water relations of tree species in the Yucatan Peninsula, Mexico

Scientific Reports ◽

10.1038/s41598-021-89835-8 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jorge Palomo-Kumul ◽

Mirna Valdez-Hernández ◽

Gerald A. Islebe ◽

Manuel J. Cach-Pérez ◽

José Luis Andrade

Keyword(s):

Water Potential ◽

Leaf Area ◽

Tropical Forests ◽

Specific Leaf Area ◽

Tree Species ◽

Deciduous Species ◽

Mature Trees ◽

Seasonally Dry ◽

Seasonally Dry Tropical Forests ◽

Dry Tropical Forests

AbstractWe evaluated the effect of ENSO 2015/16 on the water relations of eight tree species in seasonally dry tropical forests of the Yucatan Peninsula, Mexico. The functional traits: wood density, relative water content in wood, xylem water potential and specific leaf area were recorded during the rainy season and compared in three consecutive years: 2015 (pre-ENSO conditions), 2016 (ENSO conditions) and 2017 (post-ENSO conditions). We analyzed tree size on the capacity to respond to water deficit, considering young and mature trees, and if this response is distinctive in species with different leaf patterns in seasonally dry tropical forests distributed along a precipitation gradient (700–1200 mm year−1). These traits showed a strong decrease in all species in response to water stress in 2016, mainly in the driest site. Deciduous species had lower wood density, higher predawn water potential and higher specific leaf area than evergreen species. In all cases, mature trees were more tolerant to drought. In the driest site, there was a significant reduction in water status, regardless of their leaf phenology, indicating that seasonally dry tropical forests are highly vulnerable to ENSO. Vulnerability of deciduous species is intensified in the driest areas and in the youngest trees.

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