Pollen morphology of najadaceae and zannichelliaceae 角果藻科植物花粉形态的研究
2.
Ddrt - pcr method was exploited to study the differential gene expression between immature siliques of arabidopsis wide - type and ast mutant 采用ddrt - pcr的策略，分析野生型与突变型植株未成熟角果中基因表达的差异。
3.
The percentage of pod stalk area kept stable . ( 2 ) seed number per pod increased and then decreased as the single pod area increased ( 2 )每角粒数随角果的增大呈先增后减的趋势，而单个籽粒的体积和每角籽粒总体积则随角果增大逐渐增大。
4.
The results showed that : ( 1 ) the percentage of pod area in total photosynthetic area increased and the percentage of stem and branches area decreased as the single pod area increased 不同油菜品种后期的源库大小测定结果表明： ( 1 )角果皮面积占油菜后期总光合面积的比例随角果的增大而直线增加，茎枝表面积所占的比例则随角果的增大而直线下降，果柄表面积所占的比例变化不大。
5.
This procedure was simple , time - saving , highly sensitive and reproducible . based on the improved procedure , nearly 16 , 000 cdna fragments were analyzed between the immature siliques of the wide type and ast mutant , and 28 differential cdna fragments were screened 采用这个改良的的方法，分析了拟南芥野生型和ast突变型植株未成熟角果中16 ， 000个cdna扩增产物条带，从中筛选出28个差异条带。
6.
Furthermore , the study indicated that the genetic diversity of the natural population of reawnuria soongorica increased with the decreasing of the content of organic matter , water , total n and total p in soil , which had some relation with more potentiality of the genetic and variation of reawnuria soongorica in its long - term evolution to adapt worse environment 经分析表明，无叶假木贼种群与角果藜种群的shannon多样性指数分别为0 . 1403和0 . 1615 ，基因分化系数( g _ ( st ) )为0 . 1469和0 . 1659 ，揭示了两物种种群遗传变异多存在于亚种群内，亚种群间的遗传分化则不明显。
7.
Here we found g proteins also function in leaf , silique development and the yield of pollen microspore . we observed several traits or characters in the offsprings of gpal , agbl null mutation and gpa1 overexpression lines and found that the width of mutants " lamina is larger than that of the wild type , whereas the lamina length , petiole length and rosette diameter is smaller than the wild type , the ga overexpression lines is different from the mutants ; the silique length and the pedicel length is larger in mutants than that of wild type , and slightly smaller in overexpression lines than the control ; the morphometric character in silique tip is different in gpal from agbl mutants ; the yield of pollen microspore is larger in null mutants than wild type whereas smaller in overexpression lines 实验中我们跟踪观察了多代异三聚体g蛋白a亚基超表达转基因植株及a ， p亚基缺失突变体的表型特征，发现突变体的叶片宽度大于对应的野生型，叶片长度，叶柄长度及莲座直径小于野生型，而超表达植株的上述某些特征与突变体相反; gp时突变体的长角果长度，花梗柄部长度大于野生型，而超表达ga植株种英则略小于对照; gpal突变体长角果尖端未出现咭乙i突变体的特征: gpal ，口gbl突变体花粉生成量大于野生型，而超表达ga植株的花粉生成量则略小于对照。
8.
The results showed that the mean proportion of polymorphic loci ( ppb ) of anabasis aphylla , which comprised 3 subpopulations ( 58 individuals sampled ) , generated by 16 primers was 94 . 56 % , the value of ppb of ceratocarpus arenarius , which had 4 subpopulations ( 80 individuals sampled ) , using 16 primers was 98 . 00 % . the paper had proved that the higher genetic diversity and the genetic differentiation existed in the populations of boih anabasis aphylla and ceratocarpus arenarius , while the latter had much more genetic diversity than the former . moreover , the study discussed the shannon information index and nei ' s gene diversity index of the two species natural populations , which indicated that there were more genetic variations within the subpopu 另外，通过rapd资料的聚类分析及相关性分析研究，发现无叶假木贼和角果藜自然种群的遗传结构与绿洲沙漠过渡带的微生境生态因子(主要是土壤因子)相关，其中无叶假木贼亚种群遗传多样性水平不仅与土壤含水量( w ) 、钾钠离子浓度( k + na )和氯离子浓度( cl )呈显著的正相关( p 0 . 05 ) ，还与土壤中有机质( som ) 、全氮( nt )和全磷( pt )含量呈显著的负相关；同时，角果藜种群的遗传多样性水平与土壤中有机质( som )和全氮( nt )含量呈显著的正相关，而与co _ 3 ~ ( 2 - )浓度呈显著的负相关；除此之外，其它土壤生态因子与两物种遗传多样性水平的相关性均不显著(卜0 . 05 ) 。
9.
Based on the comparative analysis of style , stigma size , pod length and width , pod surface area , seed diameter and dry weight between amphidiploids and their putative diploid ancestors , we observed that some accessions of amphidiploids revealed intermediate state between the two putative parents , others resembled only one of the parents 摘要通过比较分析薹属多倍体复合种与其祖先二倍体基本种在花柱、柱头大小、角果长度、宽度、种子直径及种子干重变化上的异同，发现多倍体复合种在这些发育性状上表现出处于两个祖先二倍体亲本之间，或只偏向于其中一个祖先亲本。
10.
The genetic diversity level ofreaumuria soongorica had the negative correlation with the content of soil total p and cl " significantly ( p < 0 . 05 ) , on the contrary , it had the positive correlation with co32 - significantly ( po . 05 ) but there was no significant correlation between the genetic diversity and the other salt factors in soil , which showed that the distribution of the individuals of reawnuria soongorica correlated with some certain soluble salt 研究结果表明：无叶假木贼种群的多态位点比率( ppb )为94 . 56 ，角果藜种群的多态位点比率则为98 ，显示出分布于过渡带的无叶假木贼和角果藜种群内均存在较高的遗传多样性，而角果藜种群遗传多样性水平高于无叶假木贼种群。
