Soil microorganisms play key roles in biogeochemical cycling forest ecosystems. However, whether the responses of microbial community with stand development differed rhizosphere and bulk soils remains unknown. We collected soil Chinese fir plantations different ages (7a, 15a, 24a, 34a) subtropical China, determined bacterial fungal variation via high-throughput sequencing. The results showed that bacterial, but not fungal, diversity significantly among between (p < 0.05). differences...

Polyploidization is hypothesized to improve the freezing resistance of plants in cold regions. However, adaptive strategies and key physiological mechanisms involved resistant ability polyploids remain unclear. In Actinidia chinensis (kiwifruits), tetraploids hexaploids occupy higher altitude habitats with colder climates than diploids, providing a study system investigate responsible for differentiation between cytotypes. We characterized environmental conditions their natural distribution...

Understanding the proximate and ultimate causes of genome size (GS) variation is focus much research. However, extent intraspecific in GS debated poorly understood. This study aims to test large-genome constraint hypothesis through variations GS. was measured 53 Roscoea tibetica populations from Hengduan Mountains using flow cytometry. Stomatal density were collected wild common garden populations. Associations between environmental factors, stomatal traits explored. We found that high...

Abstract Competitive interactions drive critical ecological processes in plant communities. Yet, how competitive are influenced by polyploidy that has a widespread incidence plants remains largely unknown. To evaluate the hypothesis of asymmetry between polyploids and diploids, we competed tetraploid diploid perennial herbaceous Chrysanthemum indicum L. (Asteraceae) at different relative frequencies under contrasting soil water contents. We quantified interaction intensity competing same...

Soil fungi play an important role in nutrient cycling, mycorrhizal symbiosis, antagonism against pathogens, and organic matter decomposition. However, our knowledge about the community characteristics of soil relation to bamboo varieties is still limited. Here, we compared fungal communities different compartments (rhizosphere vs. bulk soil) moso ( Phyllostachys edulis ) its four using ITS high-throughput sequencing technology. The α diversity (Shannon index) was significantly higher than...

Nutrient resorption is a key mechanism to conserve nutrients and overcome nutrient limitation in perennial plants. As an important afforested tree species subtropical regions, Pinus massoniana grows well nutrient-poor environments, however, the age-related pattern of acquisition strategy underlying mechanisms P. plantations remain unclear.In this study, concentrations nitrogen (N) phosphorus (P) were measured green senesced needles, roots soil samples collected from with different stand ages...

Abstract Premise Spatial and temporal resource allocations within inflorescences have been well‐studied in many plants based on flowering sequence or floral position. However, there had few attempts to investigate architectural effects competition species where the blooming pattern does not follow a linear positional inflorescence. Moreover, most show female‐biased sex allocation early basal flowers, but it is unclear with inherent changeless ovule production. Methods We investigated...

Abstract Understanding the relationships among leaf and size traits environment factors is essential for understanding predicting dynamics ecophysiological processes of moso bamboo ( Phyllostachys edulis ) forests across their distribution range. Here, we evaluated these at six sites within area in China. Specifically, collected climate (mean annual temperature precipitation) soil physicochemical data from sites, measured 14 2 (height diameter) both new old bamboos relationship factors,...

To explore uncertain aspects of the processes that maintain species boundaries, we evaluated contributions pre- and postpollination reproductive isolation mechanisms in sympatric populations Arnebia guttata A. szechenyi. For this, investigated their phylogenetic relationships, traits, microenvironments, pollinator visits, action natural selection on floral outcome hand pollination between two species. Phylogenetic analysis indicates szechenyi is a derived could be closely related to guttata,...

Soil enzyme activity is an important index to characterize the nutrient requirements and limitations of soil microorganisms. In this study, Pinus massoniana plantations different stand ages (9, 17, 26, 34, 43 a) in mid-subtropical China were taken as research object; activities β-glucosidase (BG), N-acetyl-β-glucosaminidase (NAG), leucine amino-peptidase (LAP), acid phosphatase (AP), polyphenol oxidase (POX), peroxidase (POD) determined; stoichiometric ratios also calculated investigate...

Phyllostachys edulis, also known as moso bamboo, is widely distributed in China, has strong carbon sequestration potential, and contributes significantly to sinks at the regional scale. However, distribution influencing factors of soil organic (SOC) are unclear bamboo forests We selected six sites edulis northern subtropics, middle southern subtropics China determine SOC contents estimate its stocks. The relationships between geographic position, climate, vegetation, soil’s physical chemical...

Leaf stomatal and anatomical traits strongly influence plant productivity. Understanding the environmental adaptation mechanisms of leaf their relationship with ecosystem productivity is essential to better understand predict long-term strategies climate change moso bamboo forests. Here, we selected 6 sites within distribution area, measured 3 10 unmanaged stands. We explored spatial variation characteristics these response changes, assessed relationships among at regional scales through...

Changes in the frequency and severity of drought events associated with climate change could affect plant growth, development, adaptability. Hydraulic failure caused by xylem embo-lism is main physiological consequences stress. How to accurately quantify embolism particularly important for understanding responses The vulnerability usually evaluated constructing curves (VCs). Several methods have been developed construct VCs, but be inconsistent their results. A deep design principles...