Morphological and Physiological Responses of Melia azedarach Seedlings of Different Provenances to Drought Stress

Han, Chao; Chen, Junna; Liu, Zemao; Chen, Hong; Yu, Fangyuan; Yu, Wanwen

doi:10.3390/agronomy12061461

Cited by 10 publications

(14 citation statements)

References 41 publications

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“…This is similar to the research results from GAO Xiang [9]. For tree species with weak salt tolerance, there showed a direct reduction trend (the weaker the salt tolerance, the greater the salt concentration), which is consistent with the research results for the neem seedlings from Zhang Yuanlan [10].…”

Section: Discussionsupporting

confidence: 91%

Effect of salt-alkali stress on the growth and photosynthetic properties of two Prunus mume species

Ren¹,

Cai²,

Li³

2023

HSET

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[Objective] To investigate the salt resistance growth status and photosynthetic characteristics of Prunus mume and saline-alkaline resistance of different Prunus mume varieties against mixed salt stress, aiming to provide scientific basis for the application of Prunus mume in saline-alkali land. [Methods]. Taking the Prunus mume 'ZaohuaLve' and Prunus mume 'Meiren' under two years of cutting seedlings as examples, NaCl and NaHCO3 were prepared into treatment solution at a molar mass ratio of 1:1, with six gradients (i.e., 0 (CK), 100 (S1), 200 (S2), 300 (S3), 400 (S4) and 500 (S5) mmol L-1) to observe the growth status and photosynthetic reaction of test plants under different salt concentrations. [Results] With the increase of salt treatment concentration and stress time, the growth amount of leaf length, leaf width and ground diameter of the two kinds of Prunus mume decreased, and the Prunus mume 'ZaohuaLve' salt tolerance threshold (330.189 mmol L-1) is greater than Prunus mume 'Meiren' (292.453 mmol L-1). On the other hand, the chlorophyll content of the two Prunus mume increased first and then decreased, and the maximum, actual quantum yield of PS Ⅱ and photochemical quenching coefficient decreased as a whole. The net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) of the two Prunus mumes decreased overall. For the Prunus mume 'ZaohuaLve', Ci values increased at 0 - 10d, and the changes were inconsistent in Pn, Gs and Ci at later stages of salt stress. The overall trends in the Pn, Ci, and Gs values of Prunus mume 'Meiren' were consistent for the 100 and 200mmol L-1 treatments. [Conclusion] The growth index and photosynthetic index of the two Prunus mumes in the early stage of salt stress are not obvious with salt tolerance. The Prunus mume 'Meiren' salt stress was dominated by stomatal restriction in the early stage, while non-stomatal restriction was the main factor affecting photosynthesis in the later stage. By contrast, the two factors may coexist simultaneously in the Prunus mume 'Meiren'. Overall, the Prunus mume 'ZaohuaLve' was stronger than Prunus mume 'Meiren' regarding the saline-alkaline resistance.

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Section: Discussionsupporting

confidence: 91%

Effect of salt-alkali stress on the growth and photosynthetic properties of two Prunus mume species

Ren¹,

Cai²,

Li³

2023

HSET

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“…In the 10d and 20th of the stress experiment and the 10th and 20th of the rehydration experiment, the seedling height, ground diameter and biomass were recorded according to the method of Han et al. (2022) , and the root-to-body ratio was calculated.…”

Section: Methodsmentioning

confidence: 99%

Physiological response mechanism of European birch (Betula pendula Roth) to PEG-induced drought stress and hydration

Kou,

Yan,

Qin

et al. 2023

Front. Plant Sci.

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Drought stress is also one of the important abiotic factors limiting plant growth and development, and the global temperature is rising year by year, resulting in a dry environment in most terrestrial forests, which will continue to affect the growth, development and reproduction of tree species in forests. European birch(Betula pendula Roth.) native to Europe, introduced to the mountains of eastern Liaoning in 1981 (annual precipitation of about 800mm), European birch relative to downy birch (B. pubescens)has strong adaptability and drought tolerance and cold tolerance, can grow normally in eastern Liaoning, but it is easy to be affected by drought at the seedling stage and cause death, many arid and semi-arid areas have no introduction and practical application of European birch, and there is less research on the drought resistance of European birch. This study used different concentrations of PEG-6000 treatment to simulate drought stress and clarify the changes of various growth physiological parameters and photosynthetic characteristics of European birch seedlings under drought stress, in order to investigate the physiological response mechanism of European birch under drought stress . This study used different concentrations of PEG-6000 treatment to simulate drought stress and clarify the changes of various growth physiological parameters and photosynthetic characteristics of European birch seedlings under drought stress, in order to investigate the physiological response mechanism of European birch under drought stress. The findings demonstrated that stress duration and increasing PEG concentration had a highly significant impact on the growth traits of European birch seedlings (p<0.01); With increasing stress concentration and stress time, antioxidant enzyme activity, membrane lipid peroxidation, and osmoregulatory substance concentrations increased significantly (p<0.01); With increasing stress concentration and duration, photosynthetic parameters and pigments decreased highly significantly (p<0.01); Under different PEG concentration treatments, the anatomical structure of seedling leaves changed more noticeably; there was a significant effect (p <0.05) on the change in mean stomatal length and a highly significant effect (p<0.01) on the change in mean stomatal structure. The study's findings serve as a foundation for the selection and breeding of new drought-tolerant European birch species, as well as a theoretical underpinning for the use of this species in landscaping and the promotion of new drought-tolerant species in China.

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“…This area is characterized by a north subtropical monsoon climate, showcasing four well-defined seasons with plentiful sunshine, an average annual temperature of 15.2 • C, a frost-free period lasting around 233 days, an average annual precipitation of 1055.6 mm, and an average annual relative humidity of 79%. The environment here is highly conducive to the growth and development of forestry production [22]. The S. tonkinensis plantation has a density of 112 plants/mu, with a spacing of 2.15 m × 2 m between plants.…”

Section: Sampling Location and Materialsmentioning

confidence: 99%

“…We washed them rapidly with sterile, enzyme-free water, dried them, and stored them in a −80 • C refrigerator. of forestry production [22]. The S. tonkinensis plantation has a density of 112 plants/mu, with a spacing of 2.15 m × 2 m between plants.…”

Section: Sampling Location and Materialsmentioning

confidence: 99%

Transcriptome Analysis Provides Insights into Lignin Biosynthesis in Styrax tonkinensis Branches

Han,

Xu,

Chen

et al. 2024

Forests

Self Cite

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Approximately 12% of China’s papermaking raw materials are derived from wood, while the majority are sourced from branches. Styrax tonkinensis is a more desirable species for pulpwood in subtropical ultra-short rotations, whose branches are prone to breakage. Lignin has a significant impact on wood quality and pulping yield, and the growth process influences lignin biosynthesis. To explore the lignin biosynthesis pathway in S. tonkinensis, we determined the lignin content in the current-year and biennial branches on 20 July, 20 September, and 20 October and analyzed the transcriptome sequencing results. It was concluded that the lignin content showed an increasing trend in the current-year branches (182.26, 206.17, and 213.47 mg/g, respectively), while that in the biennial branches showed a decrease in the samples taken in October, without significant difference (221.77, 264.43, and 261.83 mg/g, respectively). The transcriptome sequencing results showed that 91,513 unigenes were spliced with a total length of 92,961,618 bp. KEGG pathway analysis indicated that the upregulated DEGs were mainly enriched in the phenylpropanoid biosynthesis pathway. Our study suggested that CCoAOMT, COMT, peroxidase, and F5H may serve as key enzymes regulating lignin synthesis in branches of S. tonkinensis, thereby influencing the lignin content.

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Morphological and Physiological Responses of Melia azedarach Seedlings of Different Provenances to Drought Stress

Cited by 10 publications

References 41 publications

Effect of salt-alkali stress on the growth and photosynthetic properties of two Prunus mume species

Effect of salt-alkali stress on the growth and photosynthetic properties of two Prunus mume species

Physiological response mechanism of European birch (Betula pendula Roth) to PEG-induced drought stress and hydration

Transcriptome Analysis Provides Insights into Lignin Biosynthesis in Styrax tonkinensis Branches

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