Effects of Drought Stress on Leaf Functional Traits and Biomass Characteristics of Atriplex canescens

Plants, Год журнала: 2024, Номер 13(14), С. 2006 - 2006

Опубликована: Июль 22, 2024

Drought is a critical factor constraining plant growth in arid regions. However, the performance and adaptive mechanism of Atriplex canescens (A. canescens) under drought stress remain unclear. Hence, three-year experiment with three gradients was performed common garden, leaf functional traits, biomass partitioning patterns A. were investigated. The results showed that had significant effects on traits. maintained content malondialdehyde (MDA) activity superoxide dismutase (SOD), but peroxidase (POD) catalase (CAT) decreased, proline (Pro) soluble sugar (SS) increased only heavy stress. Under stress, leaves became smaller denser, specific area (SLA) dry matter (LDMC) stability. Total decreased 60% to 1758 g seed 10% 20% non-stress group, there no difference root biomass. More allocated allocation ratio doubled from 9.62% 19.81% drought, root/shoot (R/S) 0.11 0.25. MDA significantly negatively correlated biomass, while SPAD positively total aboveground organs POD, CAT, Pro SS correlations ratio. morphological traits related shape weight allocation. Our study demonstrated made tradeoffs between potential tolerance evolved conservative strategy. These findings provide more information for an in-depth understanding adaption strategies guidance planting sustainable management semi-arid

Язык: Английский

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Leaf Functional Traits and Their Influencing Factors in Six Typical Vegetation Communities

Plants, Год журнала: 2024, Номер 13(17), С. 2423 - 2423

Опубликована: Авг. 30, 2024

Leaf functional traits (LFTs) have become a popular topic in ecological research recent years. Here, we measured eight LFTs, namely leaf area (LA), specific (SLA), thickness (LT), dry matter content (LDMC), carbon (LCC), nitrogen (LNC), phosphorus (LPC), and potassium (LKC), six typical vegetation communities (sclerophyllous evergreen broad-leaved forests, temperate coniferous cold-temperate alpine deciduous shrubs, meadows, scree sparse vegetation) the Chayu River Basin, southeastern Qinghai-Tibet Plateau. Our aim was to explore their relationships with evolutionary history environmental factors by combining RLQ fourth-corner method, method of testing phylogenetic signal. The results showed that (i) there were significant differences LFTs among communities; (ii) K values less than 1; (iii) except for LCC, all other more sensitive changes. Among these traits, LA most affected factors, followed LNC. It study minimally influenced development but significantly This further verified adaptability plants changes provides scientific basis predicting distribution diffusion direction under global change conditions.

Язык: Английский

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Robust hyperspectral estimation of eight leaf functional traits across different species and canopy layers in a subtropical evergreen broad-leaf forest

Ecological Indicators, Год журнала: 2024, Номер 169, С. 112818 - 112818

Опубликована: Ноя. 7, 2024

Язык: Английский

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Scaling relationships of lamina mass per unit area, mean thickness, and leaf bulk tissue density across nine diverse species

American Journal of Botany, Год журнала: 2024, Номер unknown

Опубликована: Дек. 7, 2024

Abstract Premise Although previous studies have reported a positive correlation between leaf dry mass per unit area (LMA) and mean thickness (LT), the LMA versus LT scaling relationship has not been determined due to limited sample sizes, despite its importance in estimating bulk tissue density (mass volume). Methods This issue was addressed using 174 185 leaves from each of nine phylogenetically diverse species investigate vs. relationship. For leaf, lamina measured at 12 positions (avoiding midribs major veins) calculate LT, based on measurements. Reduced axis regression protocols were used determine exponent (i.e., slope). Bootstrap percentile methods 95% confidence intervals slopes. Results A statistically significant found for species; seven exponents significantly greater than unity indicating that (and thus density) disproportionately increased with increasing LT. In addition, conspecific variation exceeded interspecific as consequence differences Conclusions These results indicate empirical measurements can be accurately estimate density, which provides insights into adaptive life‐history strategies, variation, (with sufficiently large data sets) phylogenetic trends.

Язык: Английский

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Does a whole plant conservation gradient exist within a subtropical broadleaved evergreen forest?

Frontiers in Plant Science, Год журнала: 2024, Номер 15

Опубликована: Дек. 11, 2024

The coordination between leaf and root traits is crucial for plants to synchronize their strategies acquiring utilizing above- belowground resources. Nevertheless, the generality of a whole plant conservation gradient still controversial. Such testing has been conducted mainly among communities at large spatial scales, thus evidence lacking within communities. This noteworthy because factors that influence trait variation differ across scales. Here, we measured pairs analogous first-order traits, including morphological (leaf thickness (LT) diameter (RD), mass per unit area (LMA) specific length (SRL), tissue density (LTD RTD)) chemical (carbon (C) nitrogen (N) concentrations in tissues), on same from 60 woody species subtropical broad-leaved evergreen forest. trade-off patterns correlations were examined using (phylogenetic) principal component analysis correlation analysis. Our results revealed two dominant dimensions variation, economics spectrum (LES) LT-LTD axis. Variations accounted by two-dimensional space (RES) (i.e., (RTD-RN) collaboration (RD-SRL)). LES correlated could be integrated into one gradient, independent dimension. Leaf N positively, phylogeny, whereas varied independently each other. These support existence but also highlight complex integration multiple adaptive forest community, which offer new insight ecological trade-offs, coexistence community assembly ecosystem.

Язык: Английский

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Effect of mixed planting on soil nutrient availability and microbial diversity in the rhizosphere of Parashorea chinensis plantations

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Окт. 15, 2024

Introduction Parashorea chinensis Wang Hsie ( Pc ) is an endangered tree species endemic to tropical and subtropical China. However, the acidic red soil areas where it distributed generally face nutrient limitation. The study of effects mixed planting on biogeochemical processes contributes sustainable management conservation . Methods We selected pure stands collected its rhizosphere bulk samples clarify effect microbial community status. Results results showed that (1) All were strongly phosphorus-deficient soils (pH < 4.0, available phosphorus <10.0 mg·kg −1 ). There was a significant aggregation for organic C, total N K, biomass, inorganic P fraction. (2) significantly increased water content, nutrients, activities β-1,4-glucosidase urease, biomass. fractions are more influenced by rhizosphere, while composition. (3) Fungi their ecological functions susceptible than bacteria are, have higher compositional complexity α-diversity in plantations. And can improve network among key microorganisms. (4) correlation between microorganisms environmental factors forests forests. Soil P, biomass C N, β-1,4-glucosidase, stable driving changes fungal bacterial communities. Conclusion In conclusion, patterns advantageous plantations improving physicochemical properties, enhancing effectiveness, promoting diversity, especially with Eucalyptus grandis × E. urophylla conducive improvement management, which provides practical references relocation protection selection fertility planting. addition, highlighted role microenvironment cycling structure, new perspectives deeper understanding soil-microbe-plant interaction mechanisms.

Язык: Английский

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Impact of canopy vertical height on leaf functional traits in a Cunninghamia lanceolata common garden experiment of Dagangshan

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Дек. 4, 2024

Background Plant functional traits represent resource acquisition strategies, and, consequently, reflect ecosystem function. As a critical focus in trait research, the study of intraspecific variation and vertical gradients canopies can better reveal plant adaptation mechanisms to environmental conditions. In this study, we examined five provenances Cunninghamia lanceolata common garden Dagangshan, Jiangxi, measured analyzed nine indicators: leaf dry matter content, relative chlorophyll specific area, tissue density, water use efficiency, carbon nitrogen carbon-to-nitrogen ratio, equivalent thickness.Results The results revealed that canopy height has minor effect on traits, with most attributed geographic provenances. Notably, 50% presented significant correlations, which were associated mainly photosynthetic capacity-related traits. differences between average values middle part are minimal, correlations among consistent each other.Conclusion influence subtropical artificial forests is limited, making it feasible analyze forest functions by collecting samples from canopy. This provides scientific evidence for research dynamics ecosystems selection superior

Язык: Английский

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