摘要：Rice(Oryza sativa)spikelets are a unique inflorescence structure and their development directly determines grain size and *** many genes related to spikelet development have been reported,the molecular mechanisms underlying this process have not been fully *** this study,we identified a new recessive rice mutant,lacking rudimentary glume 1(lrg1).The lrg1 spikelets only formed one rudimentary glume,which,along with the sterile lemmas,was homeotically transformed into lemma-like organs and acquired lemma *** transition from the spikelet to the floral meristem was delayed in the lrg1 mutant,resulting in the formation of an ectopic lemma-like organ between the sterile lemma and the terminal *** addition,we found that the abnormal lrg1 grain phenotype resulted from the alteration of cell numbers and the hull ***1 encodes a ZOS4-06-C2H2 zinc-finger protein with the typical EAR motifs,and is expressed in all organs and ***1 localizes to the nucleus and can interact with the TOPLESS-RELATED PROTEINs(TPRs)to repress the expressions of their downstream target *** together,our results reveal that LRG1 plays an important role in the regulation of spikelet organ identity and grain size.

摘要：应用径向双层介质加载圆波导内可以产生混合模HE11模式的原理,提出一种径向双层介质加载圆波导的宽带TE11-HE11模式变换器。在X波段分析了该变换器内微波模式满足的麦克斯韦方程和边界条件,推导出HE11模式的特征方程及混合方程,最后将特征方程与混合方程联立,应用MATLAB软件进行数值求解得到物理模型的设计参数曲线。应用HFSS软件对设计的模式变换器进行模拟优化仿真,结果显示在8.4010.16GHz频带内输出HE11模式纯度大于96%,最大为99.59%,相对带宽可达18.7%,理论功率容量达3.3GW。该圆波导TE11-HE11模式变换器具有结构简单、输入输出共轴、转换效率高、转换频带宽、功率容量高等优点,应用于微波辐射系统可以极大地提高辐射系统的紧凑性。

摘要：为了探究KLHL10基因在三角帆蚌性别分化中的作用,利用RACE(Rapid-amplification of cDNA ends)克隆了其cDNA全长,使用实时荧光定量分析比较其在6个不同组织(性腺、鳃、肝胰腺、斧足、闭壳肌、外套膜)、早期发育阶段(1~8月龄)性腺及12、24、36月龄雌雄性腺中表达水平的差异,运用RNA干扰(RNAi)对其功能进行初步探究。结果显示KLHL10基因cDNA全长为2361 bp,其中5′非编码区长93 bp,3′非编码区长447 bp,开放阅读框(ORF区)长1821 bp,编码606个氨基酸;qRT-PCR结果显示KLHL10基因在精巢中高表达;早期发育阶段在6月龄时表达量最高;12、24、36月龄的表达结果显示,KLHL10基因在精巢中的表达量均高于同时期在卵巢中的表达量(P<0.05)。同时,设计KLHL10基因的3条dsRNA干扰链,结果显示RNA干扰能有效减少KLHL10基因在性腺组织的表达量。根据以上结果推测KLHL10基因在三角帆蚌中是雄性相关基因,其可能参与三角帆蚌的性别分化与精巢发育。