Photosynthetic abilities, light response, and stomatal function in six agroforestry species, Dipterocarpus tuberculatus, D. alatus, Eucalyptus camaldulensis, Hevea brasiliensis, Colocasia gigantea, and C. esculenta in responses to water deficit

Cha-um, Kwankhao; Sangjun, Sirikorn; Prawetchayodom, Kunyapon; Klomklaeng, Sukanya; Cha–um, Suriyan

doi:10.2306/scienceasia1513-1874.2018.44.135

Cited by 4 publications

(2 citation statements)

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“…A positive correlation between g s and E in the leaves of elephant ear has been found, as observed in most higher plants (Jarvis and McNaughton, 1986;Jones, 1998;Tuzet et al, 2003). In C. esculenta (wild type taro), stomatal conductance plays a major role in the control of the transpiration rate in different water regimes (Cha-um et al, 2018), confirming the key results of the present study.…”

Section: Discussionsupporting

confidence: 90%

Physiological, Organic and Inorganic Biochemical Changes in the Leaves of Elephant Ear (<i>Colocasia esculenta</i> Schott var. aquatillis)

et al. 2019

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Plants produce a variety of crystals with different shapes and sizes. Based on their appearance, calcium oxalate crystals, especially raphides, have been suggested to play a key role in the defense mechanism against insect attack and microbial infections. Colocasia esculenta, a tropical plant primarily grown for its edible corms contains a large number of cells (idioblasts) with needle-like crystals of calcium oxalate (i.e., raphides). The concentration of raphides in the plant varies with the ploidy level, cultivar, organ, and micro environment. The objective of this study was to evaluate the physiological, organic and inorganic biochemical changes in the differentiated leaves of elephant ear (Colocasia esculenta var. aquatilis) and examine the rate of release of these compounds in water soluble forms. Regarding photosynthetic functions, the net photosynthetic rate (P n) was positively related to light intensity, especially in fully expanded and old leaves. However, the P n , transpiration rate (E), and stomatal conductance (g s) in young leaves were lower than those in fully expanded and older leaves, resulting in low levels of total soluble sugar content in both the petioles and leaf blades of young leaves. In contrast, oxalic acid and calcium in both petioles and leaf blades peaked at > 2.0 mg•g −1 FW and 185 mg•g −1 FW, respectively. A large number of idioblasts (~5.5 idioblasts per observed microscopic field) were observed in young leaves. Oxalic acid and calcium ions extracted from the leaf tissues were rapidly dissolved in hot water (85°C) for 10-15 min, leading to a decline in the number of idioblasts. Based on these results, petioles and leaf organs of elephant ear may be eaten safely after boiling in hot water for 15 min to dissolve CaOx.

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Section: Discussionsupporting

confidence: 90%

Physiological, Organic and Inorganic Biochemical Changes in the Leaves of Elephant Ear (<i>Colocasia esculenta</i> Schott var. aquatillis)

et al. 2019

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“…Photosynthetic responses of various plant species under abiotic stress such as water deficit [1] or under biotic stress such as fungus infection [2] have been reported; however, studies on the effect of high temperature on photosynthetic capacity of creepers are limited.…”

Section: Introductionmentioning

confidence: 99%

Effects of high temperature on photosynthetic capacity in the leaves of creepers

Yuan¹,

Li²,

Gu³

2020

ScienceAsia

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High temperature induces structural and physiological damage to plants. However, studies on the effects of constant high temperature on climbing plant species are limited. To estimate the response of photosynthetic capacity of two creeper species, Parthenocissus tricuspidata (Sieb. et Zucc.) and Parthenocissus quinquefolia (L.) Planch, to constant high-temperature treatment at noon, we measured photosynthetic pigments, gas exchange, and chlorophyll fluorescence parameters at 35, 40, and 45°C (25°C was the control treatment). High temperature significantly reduced photosynthetic pigment content, whereas carotenoid content showed the opposite trend. Net photosynthetic rate, stomatal conductance, transpiration rate, maximal quantum yield of PSII photochemistry, actual quantum yield of PSII photochemistry, and the coefficient of photochemical quenching all showed a decreasing trend, with increasing stress duration, whereas the non-regulated thermal energy loss and regulated thermal energy loss indexes increased. As temperature increased, intercellular CO 2 concentration initially decreased and then increased. Non-stomatal restriction factors were the main cause of the decrease in photosynthetic rate when temperature exceeded 40°C. These parameters recovered to pre-stress levels only in plants grown at 35°C upon stress relief. P. quinquefolia showed higher photosynthetic heat resistance and resilience than P. tricuspidata. Our results revealed photosynthetic adaptation and recovery mechanisms in two creepers grown under high-temperature stress. Molecular and genetic approaches should be considered to gain deeper insight into the mechanism underlying high temperature adaptation in these two creepers.

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Arbuscular mycorrhizal fungi modulate physiological and morphological adaptations in para rubber tree (Hevea brasiliensis) under water deficit stress

et al. 2022

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Photosynthetic abilities, light response, and stomatal function in six agroforestry species, Dipterocarpus tuberculatus, D. alatus, Eucalyptus camaldulensis, Hevea brasiliensis, Colocasia gigantea, and C. esculenta in responses to water deficit

Cited by 4 publications

References 42 publications

Physiological, Organic and Inorganic Biochemical Changes in the Leaves of Elephant Ear (<i>Colocasia esculenta</i> Schott var. aquatillis)

Physiological, Organic and Inorganic Biochemical Changes in the Leaves of Elephant Ear (<i>Colocasia esculenta</i> Schott var. aquatillis)

Effects of high temperature on photosynthetic capacity in the leaves of creepers

Arbuscular mycorrhizal fungi modulate physiological and morphological adaptations in para rubber tree (Hevea brasiliensis) under water deficit stress

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