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Yuan C.-M.,Key Laboratory for Conservation of Rare | Yuan C.-M.,Yunnan Provincial Key Laboratory for Cultivation and Utilization of Forest Plants | Yuan C.-M.,Yunnan Academy of Forestry | Wu T.,Key Laboratory for Conservation of Rare | And 9 more authors.
Ecological Research | Year: 2016

The growth, morphology and biomass allocation of 11 liana species (six light-demanding and five shade-tolerant) were investigated by growing plants in three contrasting light environments (i.e., field, forest edge and forest interior). Our objectives were to determine: (1) changes in plant traits at the species level; and (2) differences in light-demanding and shade-tolerant species in response to altered light environment. We found that all seedlings of liana species increased in total biomass, total leaf area, relative growth rate (RGR), net assimilation rate (NAR), height, basal diameter, root length, leaf number, root mass/total plant mass (RMR) and root-to-shoot dry biomass (R/S ratio), and decreased in leaf area ratio (LAR), specific leaf area (SLA), leaf size, stem mass-to-total plant mass ratio (SMR) and leaf mass-to-total plant mass ratio (LMR) with increasing light availability. Under the three light environments, the two types of species differed significantly in total biomass, total leaf area, RGR, NAR, LAR, SLA and leaf number, and not in leaf area. Only light-demanding species differed significantly in height, root length, basal diameter, RMR, SMR, LMR and R/S ratio. The mean plasticity index of growth and biomass allocation were relatively higher than the morphological variables, with significant differences between the two groups. Our results showed that liana species respond differently to changing light environments and that light-demanding species exhibit higher plasticity. Such differences may affect the relative success of liana species in forest dynamics. © 2016, The Ecological Society of Japan.

Miao F.-J.,Key Laboratory for Conservation of Rare | Chen J.,Key Laboratory for Conservation of Rare | Sun H.,CAS Shenyang Institute of Applied Ecology | Wang Y.,Key Laboratory for Conservation of Rare | And 4 more authors.
Zhiwu Shengli Xuebao/Plant Physiology Journal | Year: 2014

Dihydroflavonol 4-reductase (DFR) is a key enzyme in the anthocyanins biosynthesis pathway, and plays a critical role in flower pigmentation. The gene-specific primers were designed according to the transcriptome sequencing data, and the full-length cDNA of a novel DFR gene was cloned from Indosasa hispida cv. 'Rainbow' with the method of reverse transcription PCR. This novel gene was named as IhDFR1 (GenBank accession No. KF728205). Sequence analysis indicated that IhDFR1 was 945 bp in length and encoded a protein with 314 amino acids. Bioinformatics analysis showed that IhDFR1 had the typical functional domains of DFR protein, containing two specific binding sites and belonging to the non-Asn/Asp DFR. The IhDFR1 was homologous with the DFRs from the gramineous plants. The temporal-spatial expression analysis based on different growth stages indicated that the IhDFR1 was expressed only in the reddish violet culms. The results above preliminarily suggested that the IhDFR1 might be an important enzyme governing anthocyanin metabolism, and lay a theoretical basis for further exploration of molecular mechanism of anthocyanins and for the comprehensive exploitation and utilization of I. hispida cv. 'Rainbow'.

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