Variation in Some Structural, Biochemical and Gas Exchange Characteristics of Sun and Shade Leaves of Vernonia amygdalina

2020 ◽  
Vol 24 (02) ◽  
pp. 2410-2417
Author(s):  
Aisha Idris ◽  
Alona Cuevas Linatoc ◽  
Aisha Muhammad Aliyu ◽  
Surayya Mustapha Muhammad
Keyword(s):  
Gas Exchange ◽  
Vernonia Amygdalina ◽  
Sun And Shade Leaves ◽  
Gas Exchange Characteristics ◽  
Sun And Shade ◽  
Shade Leaves

scholarly journals Effect of Light on the Photosynthesis, Pigment Content and Stomatal Density of Sun and Shade Leaves of Vernonia Amygdalina

2018 ◽  
Vol 7 (4.30) ◽  
pp. 209 ◽  
Author(s):  
Aisha Idris ◽  
Alona C. Linatoc ◽  
Aisha M. Aliyu ◽  
Surayya M. Muhammad ◽  
Mohd Fadzelly Bin Abu Bakar
Keyword(s):  
Gas Exchange ◽  
Light Intensity ◽  
Stomatal Density ◽  
Photosynthetic Pigment ◽  
Vernonia Amygdalina ◽  
Sun And Shade Leaves ◽  
Sun And Shade ◽  
Shade Leaves ◽  
Sun Leaves ◽  
Effect Of Light

Light affects the growth and development of plants by influencing the physical appearance of one leaf as well as the appearance of the whole plant. Plant photosynthesis, stomata density, and pigment contents are all influenced by light The objective of this research is to determine the effect of light on the photosynthesis, pigment content and stomatal density of Sun and Shade Leaves of Vernonia amygdalina. Gas exchange was measured using Li-6400 and the data obtained was used to create a light response curve where parameters including light saturation point (LSP), light compensation point (LCP) and apparent quantum yield were estimated. Photosynthetic pigment were quantified spectrophotometrically.  Moreover, the stomatal density was counted under light microscope, after making a nail polish impression of the leaf. The results discovered shows that as the light intensity increases, the gas exchange and stomatal density increases while the photosynthetic pigment of the studied plant decreases (P<0.05). In addition, LSP and LCP increases with increasing light intensity. Besides, statistically significant negative correlation (P<0.05) was achieved among stomatal density and transpiration rate thereby leading to a conclusion that sun leaves of Vernonia amygdalina contribute the highest assimilation rate to the plant than shade leaves. Yet, the higher stomatal density of sun leaves provides water saving to the plant.

scholarly journals Photosynthetic induction and activity of enzymes related to carbon metabolism: insights into the varying net photosynthesis rates of coffee sun and shade leaves

2013 ◽  
Vol 25 (1) ◽  
pp. 62-69 ◽  
Author(s):  
Samuel Cordeiro Vitor Martins ◽  
Kelly Coutinho Detmann ◽  
Josimar Vieira dos Reis ◽  
Lucas Felisberto Pereira ◽  
Lílian Maria Vincis Pereira Sanglard ◽  
...  
Keyword(s):  
Carbon Metabolism ◽  
Net Photosynthesis ◽  
Photosynthetic Induction ◽  
Sun And Shade Leaves ◽  
Activity Of Enzymes ◽  
Sun And Shade ◽  
Shade Leaves

Photochemical responses to light in sun and shade leaves of Theobroma cacao L. (West African Amelonado)

2021 ◽  
Vol 276 ◽  
pp. 109747
Author(s):  
Adrian M. Lennon ◽  
Vernessa R. Lewis ◽  
Aidan D. Farrell ◽  
Pathmanathan Umaharan
Keyword(s):  
Theobroma Cacao ◽  
West African ◽  
Sun And Shade Leaves ◽  
Sun And Shade ◽  
Shade Leaves ◽  
Theobroma Cacao L

EFFECTS OF EXPOSURE TO DIRECT SUNLIGHT UPON THE DEVELOPMENT OF LEAF STRUCTURE OF TWO DECIDUOUS SHRUB SPECIES

1953 ◽  
Vol 31 (5) ◽  
pp. 537-541 ◽  
Author(s):  
R. G. H. Cormack ◽  
Anne L. Gorham
Keyword(s):  
Ground Cover ◽  
Anatomical Study ◽  
Shrub Species ◽  
Structural Modifications ◽  
Previous Season ◽  
Sun And Shade Leaves ◽  
Deep Shade ◽  
Sun And Shade ◽  
Palisade Cells ◽  
Shade Leaves

The present anatomical study of sun and shade leaves of two shrub species Menziesia glabella and Lonicera glaucescens is an outgrowth of interest in the response of ground cover plants to increased sunlight as the result of logging operations. Leaves of both shrub species developed on plants fully exposed to the sun are smaller, thicker, more compact, with longer palisade cells, less spongy mesophyll, and thicker cuticle than comparable leaves from plants growing normally in deep shade. Evidence is given for the views that (1) differences in leaf expression are not predetermined by the environment of the bud during its formation the previous season, and (2) structural modifications that result when typical shade buds are suddenly exposed to full sunlight are merely an indication of the plasticity of leaves to light.

scholarly journals Sun and shade leaves of Olea europaea respond differently to plant size, light availability and genetic variation

2011 ◽  
Vol 25 (4) ◽  
pp. 802-812 ◽  
Author(s):  
Rafael R. de Casas ◽  
Pablo Vargas ◽  
Esther Pérez-Corona ◽  
Esteban Manrique ◽  
Carlos García-Verdugo ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Olea Europaea ◽  
Light Availability ◽  
Plant Size ◽  
Sun And Shade Leaves ◽  
Sun And Shade ◽  
Shade Leaves ◽  
Olea Europaéa

Interspecific covariation between stomatal density and other functional leaf traits in a local flora

Botany ◽  
2010 ◽  
Vol 88 (1) ◽  
pp. 30-38 ◽  
Author(s):  
Jessy Loranger ◽  
Bill Shipley
Keyword(s):  
Chlorophyll Content ◽  
Stomatal Density ◽  
Leaf Traits ◽  
Functional Ecology ◽  
Leaf Trait ◽  
Leaf Chlorophyll ◽  
Sun And Shade Leaves ◽  
Angiosperm Species ◽  
Sun And Shade ◽  
Shade Leaves

Despite the importance of stomata in leaf functioning, and despite the recent interest in interspecific leaf trait covariation in functional ecology, little is known about how stomatal density relates to other leaf traits in a broad interspecific context. This is especially important because stomatal density has been widely used to deduce temporal variation in atmospheric CO2 concentrations [CO2atm] from fossilized or herbarium leaves. We therefore measured stomatal density, specific leaf area (SLA) and its components, leaf thickness, and leaf chlorophyll content in both sun and shade leaves of 169 individuals from 52 angiosperm species in southwestern Quebec. Using mixed models, we show that stomatal density decreases allometrically with increasing SLA and chlorophyll content, and increases allometrically with increasing lamina thickness. The sun–shade contrast changes the intercepts, but not the slopes, of these relationships. It is important to take into consideration these relations when correlating stomatal density with [CO2], to avoid spurious interpretations.

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