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Morpho-physiological, biochemical, and leaf epidermal responses of Desmostachya bipinnata L. in arid habitats

Morpho-physiological, biochemical, and leaf epidermal responses of Desmostachya bipinnata L. in... Abstract The response of morpho-physiological and leaf surface attributes along with antioxidant potential of Desmostachya bipinnata L. populations collected from arid regions with 1.7–3.7 soil moisture % and =22.8–49.6 dS m−1 ECe was evaluated for adaptability to aridity. Among soil attributes, soil pH, ECe, moisture content, saturation percentage, organic matter, P, Na+, K+, Ca2+, Mg2+, Cl, NH4-N, NO3-N and plant attributes related to the morphology, physiology, antioxidant potential were studied. With increasing aridity root:shoot length ratio (0.1–0.4 cm) increased while average leaf area (12–4 cm2), shoot biomass (5–0.5 g), and root biomass (0.8–0.1g) decreased significantly. Parallel to that chlorophyll a (1–0.1 mgg−1 fresh weight) degradation was observed along with reduced carotenoid content (0.25–0.05 mgg−1 fresh weight). All other organic osmolytes decreased except for total soluble sugars which increased (0.10–0.15 μmol g−1 fresh weight) as the dryness ratio increased and more activities of the antioxidant enzymes APX (0.5–3.5 units mg pro−1), CAT (0.1–0.8 units mg pro−1), POD (0.02–0.25 units μg pro−1), and SOD (2–7 units mg pro−1) were observed. Among soluble cations, Na+ concentration increased (14–24 mg g−1 dw) in shoot as the aridity increased while shoot K+ (35–15 mgg−1 dw) and Mg2+ concentration decreased in both root and shoot tissues. Ca2+ concentration increased in root while N and P content decreased. In conclusion, aridity reduced overall vegetative growth but enhanced root growth for better absorption of water from the deeper layers with concurrent silica deposition in epidermal layers for controlling water loss. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arid Land Research and Management Taylor & Francis

Morpho-physiological, biochemical, and leaf epidermal responses of Desmostachya bipinnata L. in arid habitats

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Morpho-physiological, biochemical, and leaf epidermal responses of Desmostachya bipinnata L. in arid habitats

Abstract

Abstract The response of morpho-physiological and leaf surface attributes along with antioxidant potential of Desmostachya bipinnata L. populations collected from arid regions with 1.7–3.7 soil moisture % and =22.8–49.6 dS m−1 ECe was evaluated for adaptability to aridity. Among soil attributes, soil pH, ECe, moisture content, saturation percentage, organic matter, P, Na+, K+, Ca2+, Mg2+, Cl, NH4-N, NO3-N and plant attributes related to the morphology,...
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Publisher
Taylor & Francis
Copyright
© 2022 Taylor & Francis Group, LLC
ISSN
1532-4990
eISSN
1532-4982
DOI
10.1080/15324982.2022.2052202
Publisher site
See Article on Publisher Site

Abstract

Abstract The response of morpho-physiological and leaf surface attributes along with antioxidant potential of Desmostachya bipinnata L. populations collected from arid regions with 1.7–3.7 soil moisture % and =22.8–49.6 dS m−1 ECe was evaluated for adaptability to aridity. Among soil attributes, soil pH, ECe, moisture content, saturation percentage, organic matter, P, Na+, K+, Ca2+, Mg2+, Cl, NH4-N, NO3-N and plant attributes related to the morphology, physiology, antioxidant potential were studied. With increasing aridity root:shoot length ratio (0.1–0.4 cm) increased while average leaf area (12–4 cm2), shoot biomass (5–0.5 g), and root biomass (0.8–0.1g) decreased significantly. Parallel to that chlorophyll a (1–0.1 mgg−1 fresh weight) degradation was observed along with reduced carotenoid content (0.25–0.05 mgg−1 fresh weight). All other organic osmolytes decreased except for total soluble sugars which increased (0.10–0.15 μmol g−1 fresh weight) as the dryness ratio increased and more activities of the antioxidant enzymes APX (0.5–3.5 units mg pro−1), CAT (0.1–0.8 units mg pro−1), POD (0.02–0.25 units μg pro−1), and SOD (2–7 units mg pro−1) were observed. Among soluble cations, Na+ concentration increased (14–24 mg g−1 dw) in shoot as the aridity increased while shoot K+ (35–15 mgg−1 dw) and Mg2+ concentration decreased in both root and shoot tissues. Ca2+ concentration increased in root while N and P content decreased. In conclusion, aridity reduced overall vegetative growth but enhanced root growth for better absorption of water from the deeper layers with concurrent silica deposition in epidermal layers for controlling water loss.

Journal

Arid Land Research and Management – Taylor & Francis

Published: Oct 2, 2022

Keywords: Aridity; adaptability; antioxidants; Desmostachya bipinnata; mineral nutrients; organic osmolytes

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