The growth and development of staminate inflorescence and anatomic structure of male chestnut flower were observed. Results showed that staminate in-florescence on the base of branch formed first, then upward successi...
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The growth and development of staminate inflorescence and anatomic structure of male chestnut flower were observed. Results showed that staminate in-florescence on the base of branch formed first, then upward successively. About 50 days were needed from the formation of staminate inflorescence on the base of branch to ful y develop the staminate inflorescence on the top of the branch. On the same staminate inflorescence, male flower clusters of the base formed first, then upward successively. About 20 days were needed from the formation of stami-nate inflorescence on the base of the male flower cluster to ful y develop the stami-nate inflorescence on the top of the branch. 5-7 male flowers forming a cluster, the flower number in a cluster was odd number usual y, and there was one on the top and each two paral el y arranged downward. The flower on the top came into bloom first, and then downward successively. The flowers paral el y arranged came into bloom at the same time. Sporangium of male flower of chestnut was monolocular. There were a large number of pol en grains in the sporangium. There were large differences between the development process of different sporangium in one male flower. Chestnut had larger quantity of male flowers and pol en and long period of pol ination compared with female flower. It is remained to be further studied whether it was necessary for anemophilous pol ination.
以宝华甜柿(Diospyros kaki c.v.‘Baohuatianshi’)为材料,在对试验材料进行热激处理后,检测了活性氧代谢相关生理指标的变化情况。结果表明,经过热激处理后,与对照相比,外植体内超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活力出现了提高,...
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以宝华甜柿(Diospyros kaki c.v.‘Baohuatianshi’)为材料,在对试验材料进行热激处理后,检测了活性氧代谢相关生理指标的变化情况。结果表明,经过热激处理后,与对照相比,外植体内超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活力出现了提高,丙二醛(MDA)和过氧化氢(H2O2)的含量则有所降低。说明热激处理能够降低活性氧含量,保护了细胞膜结构的完整性,抑制了褐变发生。
以中国罗田板栗品种"玫瑰红"的幼叶和花为试材,采用EST数据库分析,结合RACE技术从板栗中分离到MADS基因的cDNA全长序列并构建了其RNA干扰载体,研究开花关键基因对板栗花芽分化的影响。结果表明:CmMADS基因全长为922bp的CmMADS的cDNA序列,该序列含有1个681bp的可读框,编码227个氨基酸序列。生物信息学预测CmMADS蛋白的分子质量为25.87kDa,理论等电点为6.27,N端具有M盒保守序列,其二级结构主要由α?螺旋和无规则卷曲组成。蛋白质同源分析表明,CmMADS含有M盒和K盒2个特征性序列区域。同源建模分析显示CmMADS序列与苹果MADS蛋白的三维结构及活性位点高度相似。系统进化分析表明,板栗MADS蛋白归属植物进化分支,且与太行花的MADS蛋白归为一支。将CmMADS基因2段相同长度(283bp)的反向互补片段RMADS和FMADS连入载体pBluescript SK plus,构成中间载体pBluescript SK plus-FR。用BanHI和KpnI同时酶切中间载体pBluescript SK plus-FR和植物表达载体pCl301-ubi,回收pBluescript SK plus-FR的酶切小片段,连入pC1301-ubi大片段中,构成植物表达载体pC1301-ubi-CmMADS-RNAi。下一步拟用构建好的RNA干扰载体转化农杆菌并由其介导将重组质粒转入烟草,为深入研究该干扰载体的功能及CmMADS基因的功能提供参考。
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