Five commonly-used reference genes： ACT （actin）, UBE （ubiquitin-conjugating enzyme）, RPL2 （ribosomal protein L2）, BRP II （RNA polymerase II subunit）, and NADH （nicotinamide adenine dinucleotide） were examin...Five commonly-used reference genes： ACT （actin）, UBE （ubiquitin-conjugating enzyme）, RPL2 （ribosomal protein L2）, BRP II （RNA polymerase II subunit）, and NADH （nicotinamide adenine dinucleotide） were examined using geNorm software as reference genes for RT-qPCR. Among the tested reference genes, ACT and UBE were the most stable in all samples. In parallel, expression analysis of nitrilases in Brassica juncea var. tumida, was performed to preliminarily investigate the molecular interactions between nitrilase and clubroot development at 10, 15, 20, 25, 30, and 40 d postinoculation （dpi） with a suspension of resting spores of Plasmodiophora brassicae. The results showed that different gene expressions of nitrilases were regulated during the initial periods of clubroot development. The expression level of BjNIT1 increased sharply from 20 to 40 dpi in infected roots while there were no remarkable changes in healthy roots. From 15 to 30 dpi, the expression levels of BjNIT2 and BjNIT4 in infected roots were lower than those in non-infected roots. Finally, BjNIT2 in treatment was down approximately to control at 40 dpi. Our results suggest that BjNIT1, which promoted overproductions of auxin, might be involved in P. brassicae infection of B. juncea.展开更多
We examined salt tolerance responsive genes in Pak-choi under salt stress and analyze their potential function. The LRNA differential display was used to screen the transcript derived fragments （TDFs） related to sal...We examined salt tolerance responsive genes in Pak-choi under salt stress and analyze their potential function. The LRNA differential display was used to screen the transcript derived fragments （TDFs） related to salinity tolerance in tolerant and Loderately tolerant Pak-choi germplasm. Seventy-eight primer combinations generated 101 differential eDNA fragments, which ere divided into 10 expression types. Seven cDNA sequences （GenBank accession Nos. DQ006915-DQ006921） obtained and ,~quenced were highly homologous to some known expression genes or the genes related to the signaling pathways in plants under ifferent abiotic stress.展开更多
通过田间试验研究了红菜薹(Brassica campestris L. ssp. chinensis var. utili Tsen et Lee)废弃物还田以及化肥减施对四季豆产量和养分累积的影响。结果表明,在常规施肥的基础上,红菜薹废弃物半量和全量还田四季豆产量分别增加了13.41...通过田间试验研究了红菜薹(Brassica campestris L. ssp. chinensis var. utili Tsen et Lee)废弃物还田以及化肥减施对四季豆产量和养分累积的影响。结果表明,在常规施肥的基础上,红菜薹废弃物半量和全量还田四季豆产量分别增加了13.41%和29.43%,与红菜薹废弃物全部还田相比,全部还田+化肥用量减施30%使得四季豆产量降低了25.41%;与单施化肥相比,全部还田+化肥用量减施30%处理四季豆生物量增加了9.38%。红菜薹还田氮素、磷素和钾素累积量分别较单施化肥处理增加了18.72%~32.55%、6.35%~38.22%和5.73%~41.87%,且富集的氮、钾主要存在茎、叶片和果实中。展开更多
以茎瘤芥(Brassica juncea Coss.var.tumida Tsen et Lee)黑斑病病株为试材,对黑斑病菌5.8 S rDNA及其侧翼ITS区序列进行克隆、测序和比对分析。结果表明,5个供试病菌碱基序列同芸薹链格孢的碱基序列相似度达到99.68%,不存在大于3 bp的...以茎瘤芥(Brassica juncea Coss.var.tumida Tsen et Lee)黑斑病病株为试材,对黑斑病菌5.8 S rDNA及其侧翼ITS区序列进行克隆、测序和比对分析。结果表明,5个供试病菌碱基序列同芸薹链格孢的碱基序列相似度达到99.68%,不存在大于3 bp的碱基差异;而与甘蓝链格孢和萝卜链格孢的碱基差异较明显,均存在大于3 bp的碱基差异,且存在大量的缺失片段。初步确定引起茎瘤芥黑斑病的病原菌为芸薹链格孢。展开更多
基金financially supported by the Natural Science Foundation of Chongqing Science and Technology Commission,China (2008BB1370)Fuling Agricultural Science Institute of Chongqing,China
文摘Five commonly-used reference genes： ACT （actin）, UBE （ubiquitin-conjugating enzyme）, RPL2 （ribosomal protein L2）, BRP II （RNA polymerase II subunit）, and NADH （nicotinamide adenine dinucleotide） were examined using geNorm software as reference genes for RT-qPCR. Among the tested reference genes, ACT and UBE were the most stable in all samples. In parallel, expression analysis of nitrilases in Brassica juncea var. tumida, was performed to preliminarily investigate the molecular interactions between nitrilase and clubroot development at 10, 15, 20, 25, 30, and 40 d postinoculation （dpi） with a suspension of resting spores of Plasmodiophora brassicae. The results showed that different gene expressions of nitrilases were regulated during the initial periods of clubroot development. The expression level of BjNIT1 increased sharply from 20 to 40 dpi in infected roots while there were no remarkable changes in healthy roots. From 15 to 30 dpi, the expression levels of BjNIT2 and BjNIT4 in infected roots were lower than those in non-infected roots. Finally, BjNIT2 in treatment was down approximately to control at 40 dpi. Our results suggest that BjNIT1, which promoted overproductions of auxin, might be involved in P. brassicae infection of B. juncea.
基金Project supported by the National "the Tenth Five-Year-Plan" Key Program (No. 2004BA525B08)China and the Key Laboratory of Vegetable Genetics and Physiology, Ministry of Agriculture, China
文摘We examined salt tolerance responsive genes in Pak-choi under salt stress and analyze their potential function. The LRNA differential display was used to screen the transcript derived fragments （TDFs） related to salinity tolerance in tolerant and Loderately tolerant Pak-choi germplasm. Seventy-eight primer combinations generated 101 differential eDNA fragments, which ere divided into 10 expression types. Seven cDNA sequences （GenBank accession Nos. DQ006915-DQ006921） obtained and ,~quenced were highly homologous to some known expression genes or the genes related to the signaling pathways in plants under ifferent abiotic stress.
文摘通过田间试验研究了红菜薹(Brassica campestris L. ssp. chinensis var. utili Tsen et Lee)废弃物还田以及化肥减施对四季豆产量和养分累积的影响。结果表明,在常规施肥的基础上,红菜薹废弃物半量和全量还田四季豆产量分别增加了13.41%和29.43%,与红菜薹废弃物全部还田相比,全部还田+化肥用量减施30%使得四季豆产量降低了25.41%;与单施化肥相比,全部还田+化肥用量减施30%处理四季豆生物量增加了9.38%。红菜薹还田氮素、磷素和钾素累积量分别较单施化肥处理增加了18.72%~32.55%、6.35%~38.22%和5.73%~41.87%,且富集的氮、钾主要存在茎、叶片和果实中。
文摘以茎瘤芥(Brassica juncea Coss.var.tumida Tsen et Lee)黑斑病病株为试材,对黑斑病菌5.8 S rDNA及其侧翼ITS区序列进行克隆、测序和比对分析。结果表明,5个供试病菌碱基序列同芸薹链格孢的碱基序列相似度达到99.68%,不存在大于3 bp的碱基差异;而与甘蓝链格孢和萝卜链格孢的碱基差异较明显,均存在大于3 bp的碱基差异,且存在大量的缺失片段。初步确定引起茎瘤芥黑斑病的病原菌为芸薹链格孢。
文摘通过制作石蜡切片研究了菜薹[Brassi cacampestris L.ssp.chinensis （L.） Makinovar.utilis Tsen et Lee]早熟品种‘油青四九’和晚熟品种‘油青甜菜心80天’的花芽分化过程，结果表明，当展开2-3片真叶时花芽分化开始启动。用已报道的拟南芥Flowering locus C（FLC）基因和FRIGIDA（FRI）基因的保守区域设计引物，通过RT-PCR的方法从两个菜薹品种中均克隆得到了两个决定开花的关键基因，并命名为BrcuFLC（GenBank登录号为EF138603）和BrcuFRI（GenBank登录号为EU700362）。半定量式RT-PCR表达分析表明，BrcuFLC基因在早、晚熟菜薹品种的不同发育时期表达存在差异，表达量随真叶数增加而逐步减少，但在晚熟品种中BrcuFLC表达量降低幅度小；BrcuFRI则在早、晚熟品种的所有阶段表达都较低。BrcuFLC在菜薹不同部位表达的情况不同，在茎、叶中的表达强，花次之，根中表达较弱；而Brcu-FRI在早、晚熟品种根中的表达量明显高于其它3个部位。
