Impact of competition on the growth of Pinus tabulaeformis in response to climate on the Loess Plateau of China

Plant Ecology - As climate changes, understanding tree responses to climate is important to predict tree growth, and plant competition as a nonnegligible biotic factor plays a key role in such...     

A prostate cancer tissue specific spectral library for targeted proteomic analysis

Prostate cancer is the most common cancer in males worldwide. Mass spectrometry-based targeted proteomics has demonstrated great potential in quantifying proteins from formalin-fixed paraffin-embedded (FFPE) and (fresh) frozen biopsy tissues. Here we provide a comprehensive tissue-specific spectral library for targeted proteomic analysis of prostate tissue samples. Benign and malignant FFPE prostate tissue samples were processed into peptide samples by pressure cycling technology (PCT)-assisted sample preparation, and fractionated with high-pH reversed phase liquid chromatography (RPLC). Based on data-dependent acquisition (DDA) MS analysis using a TripleTOF 6600, we built a library containing 108,533 precursors, 84,198 peptides and 9384 unique proteins (1% FDR). The applicability of the library was demonstrated in prostate specimens.     

民勤绿洲—荒漠过渡带植物叶性状的研究

以民勤绿洲—荒漠过渡带20种主要植物为研究对象,通过对叶片6个功能性状的测定,分析荒漠植物叶性状的变异及相关性,比较不同功能群植物叶性状的差异性,探讨荒漠植物对环境的适应性,为该地区植被的恢复和重建提供理论依据。结果表明：①叶性状存在种间差异且变异程度不同,变异范围为14.11%~47.63%,叶绿素含量（ChlC）变异系数最大,叶片全氮含量（LCC）变异系数最小。②叶干物质含量（LDMC）与ChlC、LCC均呈极显著正相关（P＜0.01）,ChlC与LCC呈极显著正相关（P＜0.01）,其他叶性状间相关性不显著。③不同功能群植物叶性状存在显著差异。其中,豆科植物叶片LDMC、ChlC、LCC极显著高于藜科植物（P＜0.01）。草本植物叶片比叶面积（SLA）极显著高于灌木植物叶片（P＜0.01）。一年生植物叶片SLA、LNC显著高于多年生植物（P＜0.05）;多年生植物叶片LDMC极显著高于一年生植物（P＜0.01）;多年生植物叶片C含量显著高于一年生植物（P＜0.05）。C₃植物叶片LDMC、ChlC显著高于C₄植物（P＜0.05）;C₄植物叶片δ¹³C极显著高于C₃植物 （P＜0.01）;C₃植物叶片LCC极显著（P＜0.01）高于C₄植物。