Evaluation of salt and drought tolerances of Populus talassica × Populus euphratica seedlings using leaf anatomical structures and physiological processes

Sun, Yang; Liu, Ying; Su, Meng Xu; Han, Zhanjiang; Shi, Jian Yin

doi:10.30848/pjb2023-4(4)

Cited by 3 publications

(2 citation statements)

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“…Under drought stress, the leaf anatomy of trees is also altered. With the increase of drought severity, the thickness of palisade tissue and leaf tissue structural tightness increase and the intercellular air space decreases [72,73]. Moreover, the mesophyll cells may be deformed under severe drought [74].…”

Section: Morphological and Anatomical Responses Of Plants Under Droughtmentioning

confidence: 99%

Responses of Physiological, Morphological and Anatomical Traits to Abiotic Stress in Woody Plants

Li,

Lu,

Wang

et al. 2023

Forests

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Abiotic stresses could have complex and diverse effects on the growth and development of forest trees. In this review, we summarized the responses of morphological, physiological and anatomical traits in woody plants to abiotic stresses, including drought, flood, extreme temperature, salinity, heavy metal, microplastics and combined stresses, especially from the xylem perspective. Under most abiotic stress, xylem hydraulic conductivity decreases, which is associated with leaf stomatal regulation and the inhibition of aquaporin (AQP) activity. Meanwhile, woody plants regulate the size and morphology of their roots and leaves to balance water absorption and transpiration. The anatomical traits are also altered, such as denser leaf stomata, narrower conduits and thicker cell walls. In addition, different stresses have unique effects, such as flood-induced adventitious roots and aeration tissues, forest fire-induced irreversible xylem damage, low temperature-induced tissue freezing, salt stress-induced hinderance of ion absorption and heavy metal-induced biological toxicity. Under stresses of drought, flooding and heavy metals, woody plants’ growth may occasionally be promoted. The effects of combined stress on the physiological, morphological and anatomical traits of woody plants are not simply additive, with the related mechanism to be further studied, especially in natural or near-natural conditions.

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Section: Morphological and Anatomical Responses Of Plants Under Droughtmentioning

confidence: 99%

Responses of Physiological, Morphological and Anatomical Traits to Abiotic Stress in Woody Plants

Li,

Lu,

Wang

et al. 2023

Forests

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“…The scarcity of water resources is a major challenge in arid and semi-arid areas 1 – 3 , which limits agricultural productivity 4 – 6 and poses a threat to food security 7 , 8 . In these regions, irrigation is essential for crop growth and development, but limited water resources pose a challenge 9 , 10 . In this context, sugarcane industrial effluent can be considered a potential alternative source of irrigation water, which can meet the water demands of crops and alleviate the scarcity of irrigation water 11 .…”

Section: Introductionmentioning

confidence: 99%

Impacts of sugarcane industrial effluent as an alternate source of irrigation on growth, chlorophyll contents and antioxidants of different canola varieties

Ullah,

Elahi,

Imtiaz

et al. 2024

Sci Rep

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The sugarcane industry often utilizes effluent for irrigation purposes; however, its intricate composition and elevated metal contaminants pose a potential risk of soil and crop contamination. Consequently, it is imperative to employ effective strategies to ensure the safe utilization of this resource for crop cultivation. One such strategy involves the dilution of sugarcane industry effluent. Dilution is a practical approach to mitigate its toxicity, minimizing its adverse impact on soil and crop health. That’s why the current study explored the best dilution of sugarcane industrial effluent (SW) for cultivating canola varieties. A total of 15 canola varieties were cultivated 0%, 20%, 40%, 60%, 80%, and 100% SW. Results showed that 60% SW Faisalabad Canola and Punjab Canola improved germination, shoot length, root length, shoot fresh and dry weight, root fresh and dry weight, and chlorophyll contents compared to other treatments and control. AARI Canola and CON-III showed poor growth and chlorophyll contents under 60%SW. Dunkled and Oscar cultivars showed moderate improvement in growth and chlorophyll contents under 60SW. The 60% SW can be recommended for maximum growth benefits in canola cultivars, specifically Faisalabad Canola and Punjab Canola. At 20SW, the root dry weight of Faisalabad Canola increased by 2.7%, while Punjab Canola increased by 3.4%. Canola showed the highest increase in POD activity compared to the control, with a 55.45% increase, followed by Sandal Canola, with a 43.26% increase. However, additional field-level experiments are needed to determine the best cultivars suitable for optimal growth under 80SW and 60SW irrigation conditions.

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Compensatory Growth and Physiological Protective Mechanisms of Populus talassica Kom. × Populus euphratica Oliv. in Response to Leaf Damage

Su,

Han,

Liu

et al. 2023

Forests

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The compensatory growth and defensive capabilities of woody plants after damage are crucial to their large-scale promotion and economic value. Here, Popular talassica × Popular euphratica were subjected to artificial defoliation treatments that simulated leaf damage [25% (D25), 50% (D50), and 75% (D75) leaf removal] to study the growth, anatomical, and physiological characteristics. The results showed that D25 and D50 treatments significantly increased the growth parameters, such as leaf length, leaf area, and specific leaf area, but did not affect the distributions of root and stem biomasses compared with the CK. However, the D75 treatment significantly decreased most growth parameters. The time required for the chlorophyll content to recover increased along with the damage intensity as follows: D25, high-flat-high; D50, low-high-flat; and D75, low-flat-high. Furthermore, leaf damage significantly reduced stomatal density, whereas the stomatal width, area, opening, and Pn significantly increased by 8.59%, 8.40%, 23.27%, and 31.22%, respectively, under the D50 treatment, generating a photosynthetic compensation response. The leaf anatomical parameters increased along with damage intensity, except spongy tissue thickness, which decreased, while the stem anatomical parameters showed trends of first increasing and then decreasing, reaching maxima under the D50 treatment. The enzymes showed an increasing and then decreasing trend as the damage time increased. After 1 d of treatment, CAT, POD, and PAL activities peak at D75, in contrast to a peak of SOD activity at D50. Overall, these findings indicate that it is advisable to keep the amount of leaf damage within 50%. The leaf damage can have an impact on the growth of P. talassica × P. euphratica. They adjusted their resource allocation strategy and physiological defense capacity by increasing the chlorophyll content, improving photosynthetic capacity, changing stem and leaf anatomy, and increasing defense enzyme activity levels, thereby improving their damage tolerance and adaptability.

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Evaluation of salt and drought tolerances of Populus talassica × Populus euphratica seedlings using leaf anatomical structures and physiological processes

Cited by 3 publications

References 0 publications

Responses of Physiological, Morphological and Anatomical Traits to Abiotic Stress in Woody Plants

Responses of Physiological, Morphological and Anatomical Traits to Abiotic Stress in Woody Plants

Impacts of sugarcane industrial effluent as an alternate source of irrigation on growth, chlorophyll contents and antioxidants of different canola varieties

Compensatory Growth and Physiological Protective Mechanisms of Populus talassica Kom. × Populus euphratica Oliv. in Response to Leaf Damage

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