Influence of Water Stress on Morphological and Physiological Changes in Andrographis paniculata

Bhargavi, B.

doi:10.18782/2320-7051.5932

Cited by 5 publications

(2 citation statements)

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“…The majority of photosynthetic products are produced primarily in the leaf, which is the main portion of the plant. When Andrographis paniculate was subjected to water stress, precocious leaf fall was found [28]. Reduced leaf area due to water stress results in less photosynthesis, which lowers crop output.…”

Section: Leaf Modificationmentioning

confidence: 99%

Molecular Basis of Plant Adaptation against Aridity

Mondal¹,

Raj²,

Thakur³

et al. 2023

Abiotic Stress in Plants - Adaptations to Climate Change

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Environment fluctuations have become the greatest threat to global food security. Of various abiotic stress factors, aridity hampers the most yield contributing attributes. In the context of agriculture, term “aridity” refers to a protracted period of insufficient precipitation, having detrimental influence on crop development and overall biological output. A sustained drought has considerable negative effects on crops and livestock, including the reduced production, destruction of property, and livestock sell-offs. Consequently, plants themself exert various kinds of defensive mechanisms to combat the ill effects of climate change. For example, plants with small leaves, benefit from aridity as part of their strategy for modifying the soil to water shortages and nutrient restrictions. Furthermore, low genetic diversity among significant crop species, together with ecological productivity limits, must be addressed in order to adapt crops to episodic drought spells in the coming days. A deeper understanding of the molecular and genetic underpinnings of the most important intrinsic adaptation responses to drought stress seems to be beneficial for gene engineering as well as gene-based expression investigations in plant systems under hostile environment. Recently, molecular markers and “omics” have opened a huge opportunity to identify and develop specific gene constructs governing plant adaptation to environmental stress.

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Section: Leaf Modificationmentioning

confidence: 99%

Molecular Basis of Plant Adaptation against Aridity

Mondal¹,

Raj²,

Thakur³

et al. 2023

Abiotic Stress in Plants - Adaptations to Climate Change

View full text Add to dashboard Cite

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“…In some plants, water deficit conditions improved root to shoot proportion or root biomass allocation as an important strategy of plants to enhance the water balance ( Braatne et al, 1992 ; Tschaplinski et al, 1994 ). Water stress can cause alterations in a range of leaf morpho-anatomical characteristics, such as in leaf thickness, xylem vessels, occlusions, leaf biomass, leaf area, and specific leaf area (SLA) ( Bhargavi et al, 2017 ; Byambadorj et al, 2021 ). Some studies reported that a reduction in leaf area of drought-exposed plants is a mechanism to maintain cell turgidity and achieve stability among the water absorbed by the roots ( Najla et al, 2012 ; Srivastava and Srivastava, 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Morpho-Anatomical Traits and Soluble Sugar Concentration Largely Explain the Responses of Three Deciduous Tree Species to Progressive Water Stress

Hernandez

Combalicer

et al. 2021

Front. Plant Sci.

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A better understanding of plant drought responses is essential to improve plant water use efficiency, productivity, and resilience to ever-changing climatic conditions. Here, we investigated the growth, morpho-anatomical, physiological, and biochemical responses of Quercus acutissima Carruth., Quercus serrata Murray, and Betula schmidtii Regel to progressive water-stress. Seedlings were subjected to well-watered (WW) and water-stressed (WS) conditions while regularly monitoring the soil volumetric water content, stem diameter (SD), height, biomass, stomatal conductance (gs), intercellular CO2 concentration (Ci), and leaf relative water content (RWC). We also investigated the variation in stomatal pore (SP) area, specific leaf area (SLA), root xylem vessel diameter (VD), and total soluble sugar (TSS) concentration between treatments. After 2 months, WS significantly suppressed SD growth of Q. acutissima and B. schmidtii but had no impact on Q. serrata. Total biomass significantly declined at WS-treated seedlings in all species. WS resulted in a smaller SLA than WW in all species. The SP of WS-treated seedlings of Q. acutissima and B. schmidtii significantly decreased, whereas it increased significantly with time in Q. serrata. Larger vessels (i.e., >100 to ≤ 130) were more frequent at WS for Q. acutissima and B. schmidtii, whereas smaller vessels (i.e., >40 to ≤ 90) were more frequent at WS than at WW for Q. serrata after 8 weeks. Tylosis was more frequent at WS than WW for Q. serrata and B. schmidtii at eighth week. WS seedlings showed lower gs, Ci, and RWC compared with WW-treated ones in Q. acutissima and B. schmidtii. TSS concentration was also higher at WS-treated seedlings in two Quercus species. Overall, principal component analysis (PCA) showed that SLA and SP are associated with WS seedlings of Q. serrata and B. schmidtii and the tylosis frequency, TSS, and VD are associated with WS seedlings of Q. acutissima. Therefore, water-stressed plants from all species responded positively to water stress with increasing experimental duration and stress intensity, and that is largely explained by morpho-anatomical traits and soluble sugar concentration. The present study should enhance our understanding of drought-induced tree growth and short-term tree-seedling responses to drought.

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