Low-temperature induced leaf elements accumulation in aquatic macrophytes across Tibetan Plateau

Wang, Zhong; Xia, Chengxing; Yu, Dan; Wu, Zhigang

doi:10.1016/j.ecoleng.2014.11.015

Cited by 27 publications

(41 citation statements)

References 47 publications

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“…In this study, the increasing trends of total N in the needles and stems suggested that N availability did not constrain sink activity at higher altitudes, which is why the treeline trees had no sufficient nutrient supply. This result was in agreement with those of previous studies, which showed that the tissue N content in treeline trees is higher than that in lower elevation trees [10,20,[37][38][39]. Reich et al [40] also reported that plants at high elevations exhibit N-physiological adaptation strategies to compensate for lower efficiency of physiological processes in low temperature environments.…”

Section: Response Of Nsc and N To The Increasing Elevationssupporting

confidence: 91%

Transcriptomic Analysis Reveals the Mechanism of Picea crassifolia Survival for Alpine Treeline Condition

Shi

Deng

Dengzhong

et al. 2020

Forests

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The physiological mechanisms driving treeline formation succession captured the attention of ecologists many years ago, yet they are still not fully understood. In this study, physiological parameters (soluble sugars, starch, and nitrogen) were investigated in combination with transcriptomic analysis in the treeline tree species Picea crassifolia. The study was conducted in the middle of Qilian Mountain Reserves, Gansu Province, China, within the elevation range of 2500–3300 m. The results showed that the concentrations of non-structural carbohydrates decreased with increasing elevation in the current-year needles and current-year branches, as well as in the coarse and fine roots. RNA-Seq demonstrated that 483 genes were upregulated and 681 were downregulated in the comparison of 2900 and 2500 m (2900 vs. 2500), 770 were upregulated and 1006 were downregulated in 3300 vs. 2500, and 282 were upregulated and 295 were downregulated in 3300 vs. 2900. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that the differentially expressed genes were highly enriched in photosynthesis-related processes, carbon fixation and metabolism, and nitrogen metabolism. Furthermore, almost all photosynthesis-related genes were downregulated, whereas many genes involved in cuticle lipids and flavonoid biosynthesis were upregulated, contributing to the survival of P. crassifolia under the treeline condition. Thus, our study provided not only molecular evidence for carbon limitation hypothesis in treeline formation, but also a better understanding of the molecular mechanisms of treeline tree survival under adverse conditions.

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Section: Response Of Nsc and N To The Increasing Elevationssupporting

confidence: 91%

Transcriptomic Analysis Reveals the Mechanism of Picea crassifolia Survival for Alpine Treeline Condition

Shi

Deng

Dengzhong

et al. 2020

Forests

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“…Temperature increase would lead to a depression of tissue nutrient concentrations of aquatic macrophytes [47]. According to our study, nitrogen content and the C:N ratio varies significantly between temperature elevated and ambient, but carbon content did not change.…”

Section: Warming and Phosphorus Addition Effect On P Crispus Stoichisupporting

confidence: 43%

“…Macrophytes grown in warmer regions, need less nutrients (e.g., nitrogen, phosphorus) because of the higher efficiency of biochemical reactions than cold habitats [48]. The negative correlation between temperature and nutrients indicates that when exposed in low-temperature environment, macrophytes tend to conserve more nutrients to counteract the negative effects [47]. However, P. crispus generally stops growing at temperature above 24 • C, and starts to decompose when temperature surpass 30 • C; it thrives better at low temperatures (10-20 • C) [49].…”

Section: Warming and Phosphorus Addition Effect On P Crispus Stoichimentioning

confidence: 99%

Maternal Environment Effect of Warming and Eutrophication on the Emergence of Curled Pondweed, Potamogeton crispus L.

Tao

Zhang

et al. 2018

Water

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Maternal effects may play an important role in life history and offspring performance of aquatic plants. Performance and response of maternal and offspring aquatic plants can affect population dynamics and community composition. Understanding maternal effect can help to fill a gap in the knowledge of aquatic plant life cycles, and provide important insights for species’ responses to climate change and eutrophication. This study showed that maternal warming and eutrophication significantly affected the early life stages of curled pondweed, Potamogeton crispus, a submerged macrophyte. Propagule in warmed condition had higher germination percentages and a shorter mean germination time than those under ambient conditions. However, propagule germination in phosphorus addition treatment was inhibited due to the negative effect of eutrophication, e.g., phytoplankton competition and deteriorated underwater light. Meanwhile, elevated temperature led to a decrease of total nitrogen concentrations and an increase of carbon: nitrogen ratios in plant tissues, which may suggest that P. crispus will allocate more nutrients to propagules in order to resist the adverse effects of high temperature. A subsequent germination experiment in the same ambient condition showed that maternal warming promoted seedling emergence in contrast to maternal phosphorus addition. Consequently, global warming could modify population growth via maternal environmental effects on early life histories, while increased anthropogenic nutrient inputs may result in a decreased submerged macrophyte. These maternal effects on offspring performance may change competition and the survival of early life-history stages under climate warming and eutrophication through changing the ecological stoichiometry of plant tissue.

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“…The C:nutrient ratios might decrease (Ventura et al, 2008;Velthuis et al, 2017), remain unaltered (Zhang et al, 2016), or even increase (Kaldy, 2014;Zhang et al, 2016;Velthuis et al, 2018) in response to temperature rise. Similarly, field studies over a large temperature range also showed contradictory results, where the plant C:nutrient ratio either increased as temperature increased (Wang et al, 2015) (in the Tibetan Plateau, with minor anthropogenic disturbance), or decreased as temperature increased (Xia et al, 2014) (in eastern China, with high external nutrient loading to the water bodies). These contradictory impacts of temperature on the plant C:nutrient ratios might be caused by variation in nutrient conditions among experimental studies or field sites, suggesting that the impact of temperature rise on aquatic plant stoichiometry may depend on the nutrient availability in the environment.…”

Section: Introductionmentioning

confidence: 99%

Interactive Effects of Rising Temperature and Nutrient Enrichment on Aquatic Plant Growth, Stoichiometry, and Palatability

et al. 2020

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Low-temperature induced leaf elements accumulation in aquatic macrophytes across Tibetan Plateau

Cited by 27 publications

References 47 publications

Transcriptomic Analysis Reveals the Mechanism of Picea crassifolia Survival for Alpine Treeline Condition

Transcriptomic Analysis Reveals the Mechanism of Picea crassifolia Survival for Alpine Treeline Condition

Maternal Environment Effect of Warming and Eutrophication on the Emergence of Curled Pondweed, Potamogeton crispus L.

Interactive Effects of Rising Temperature and Nutrient Enrichment on Aquatic Plant Growth, Stoichiometry, and Palatability

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