FQ-PCR Analysis on the Differential Expression of the Key Enzyme Genes Involved in Isoprenoid Metabolic Pathway in Allelopathic and Weak Allelopathic Rice Accessions (Oryza sativa L.) under Nitrogen Stress Condition Proteomic analysis of nitrogen stress-responsive proteins in the leaves of tall fescue How nitrogen and drought stress affect growth and nitrogen use efficiency for Fuji and Qinguan apple seedlings Biological response of different cultivars of millet to low nitrogen stress Field Response to Low Nitrogen of Barley DH Lines from Microspores Mutagenesis and Culture under Nitrogen Stress Effect of low nitrogen stress on different low nitrogen tolerance maize cultivars seedling stage growth and physiological characteristics Biological Response of Roots in Different Spring Wheat Genotypes to Low Nitrogen Stress Effects of low nitrogen stress on the physiological and morphological traits of roots of different low nitrogen tolerance maize varieties at seedling stage Indexes screening and comprehensive evaluation of low nitrogen tolerance of hybrid maize cultivars at seedling stage Use of genotype-environment interactions to elucidate the pattern of maize root plasticity to nitrogen deficiency Response of root morphology to low nitrogen stress in maize seedling Effects of low nitrogen stress on photosynthetic characteristics and chlorophyll fluorescence parameters of maize cultivars tolerant to low nitrogen stress at the seedling stage Transcriptome library construction in whole plant of Erigeron breviscapus stressed by low nitrogen and its sequencing