The frequency and severity of drought are expected to increase due to climate change; therefore, selection of tree species for afforestation should consider drought resistance of the species for maximum survival and conservation of natural habitats. In this study, three soil moisture regimes: control (100% precipitation), mild drought (40% reduction in precipitation), and severe drought (80% reduction in precipitation) were applied to six gymnosperm and five angiosperm species for two consecutive years. We quantified the drought resistance index based on the root collar diameter and assessed the correlation between species drought resistance and other morphological, physiological, and biochemical traits by regression analysis. The prolonged drought stress altered the morphological, physiological, and biochemical traits, but the responses were species-specific. The species with high drought resistance had high leaf mass per area (LMA), photosynthetic rate (P), and midday leaf water potential (Ψ), and low carbon isotopic discrimination (δC), flavonoid and polyphenol content, superoxide dismutase and DPPH radical scavenging activity. The highly drought-resistant species had a relatively less decrease in leaf size, P, and predawn leaf water potential (Ψ), and less increase in δC, abscisic acid and sucrose content, and LMA compared to the control. The interannual variation in drought resistance (∆R) was positively correlated with the species hydroscopic slope (isohydric and anisohydric). Korean pine was highly resistant, sawtooth oak, hinoki cypress, East Asian white birch, East Asian ash, and mono maple were highly susceptible, and Korean red pine, Japanese larch, Sargent cherry, needle fir, and black pine were moderate in drought resistance under long-term drought. These findings will help species selection for afforestation programs and establishment of sustainable forests, especially of drought-tolerant species, under increased frequency and intensity of spring and summer droughts.
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http://dx.doi.org/10.1016/j.scitotenv.2021.146466 | DOI Listing |
Evolution
December 2024
Department of Genetics, University of Georgia, Athens, GA 30602 USA.
Abiotic and biotic factors interact to influence phenotypic evolution; however, identifying the causal agents of selection that drive the evolution and expression of traits remains challenging. In a field common garden, we manipulated water availability and herbivore abundance across three years, and evaluated clinal variation in functional traits and phenology, plasticity, local adaptation, and selection using diverse accessions of the perennial forb, Boechera stricta. Consistent with expectations, drought stress exacerbated damage from herbivores.
View Article and Find Full Text PDFFront Plant Sci
December 2024
International Magnesium Institute, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, China.
In recent years, the global rise in temperatures has led to drought and heat becoming major environmental stresses that limit plant growth. Previous research has demonstrated the potential of in augmenting plant stress resistance. However, specific studies on its effects and underlying mechanisms in cuttings of , and Planch are relatively limited.
View Article and Find Full Text PDFFront Plant Sci
December 2024
National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China.
Introduction: Drought stress severely hampers seedling growth and root architecture, resulting in yield penalties. Seed priming is a promising approach to tolerate drought stress for stand establishment and root development.
Methods: Here, various seed priming treatments, .
J Adv Res
December 2024
College of Forestry and Grasslands, Jilin Provincial Key Laboratory of Tree and Grass Genetics and Breeding, Jilin Agriculture University, Changchun 130118, China. Electronic address:
Background: Trehalose is a nonreducing disaccharide containing two glucose molecules linked through an α,α-1,1-glycosidic bond. This unique chemical structure causes trehalose levels to fluctuate significantly in plants under stress, where it functions as an osmoprotectant, enhancing plant resistance to stress. Previous studies have confirmed that the trehalose synthesis pathway is widely conserved across most plants.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
College of Horticulture, Hebei Agricultural University, Baoding, Hebei 071001, China; Research Center of Chinese Jujube, Hebei Agricultural University, Baoding, Hebei 071001, China. Electronic address:
Chinese jujube (Ziziphus jujuba Mill.) exhibits a remarkable resilience to both drought and salinity. Additionally, it is characterized by a high sugar content, with sucrose being the predominant component of its soluble sugars.
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