藕莲有性繁殖栽培

根据莲(Nelumbo nucifera)生物学特性,既可用藕作种进行无性繁殖,也可用种子播种进行有性繁殖。藕莲在我国有数千年的栽培历史,但素以无性系栽培。尚未见到有性繁殖栽培的报道。作者自1980年起进行了有性繁殖栽培试验。       

皖西霍山县白马尖植物区系和植被

本文论述了北亚热带典型地段——大别山主峰白马尖的植被和植物区系的特点,提出白马尖地区是一“生物避难所”。与纬度相近地区的比较研究,结果表明,海拔1000米以上的山地,植被类型和植物区系成份与皖南黄山、浙北天目山较一致,而低海拔地区与江苏的宜溧山区相似,特别是常绿阔叶树的属、种极为一致。值得指出的是耐寒常绿阔叶林类型的发现,为北亚热带植被地带的概念增添了新内容。文中对原圈定佛子岭水库库区周围为水源涵养林自然保护区认为不妥,将白马尖主峰整个集水区包括在内,才是完善的。     

Ultrathin Co3O4 Layers with Large Contact Area on Carbon Fibers as High‐Performance Electrode for Flexible Zinc–Air Battery Integrated with Flexible Display

A facile and binder‐free method is developed for the in situ and horizontal growth of ultrathin mesoporous Co₃O₄ layers on the surface of carbon fibers in the carbon cloth (ultrathin Co₃O₄/CC) as high‐performance air electrode for the flexible Zn–air battery. In particular, the ultrathin Co₃O₄ layers have a maximum contact area on the conductive support, facilitating the rapid electron transport and preventing the aggregation of ultrathin layers. The ultrathin feature of Co₃O₄ layers is characterized by the transmission electron microscopy, Raman spectra, and X‐ray absorption fine structure spectroscopy. Benefiting from the high utilization degree of active materials and rapid charge transport, the mass activity for oxygen reduction and evolution reactions of the ultrathin Co₃O₄/CC electrode is more than 10 times higher than that of the carbon cloth loaded with commercial Co₃O₄ nanoparticles. Compared to the commercial Co₃O₄/CC electrode, the flexible Zn–air battery using ultrathin Co₃O₄/CC electrode exhibits excellent rechargeable performance and high mechanical stability. Furthermore, the flexible Zn–air battery is integrated with a flexible display unit. The whole integrated device can operate without obvious performance degradation under serious deformation and even during the cutting process, which makes it highly promising for wearable and roll‐up optoelectronics.     

前列腺素在胚胎着床和蜕膜化中的作用

前列腺素在哺乳动物的雌性生殖过程中起着十分重要的作用.环氧合酶-2 (cyclooxygenase-2, COX-2)主要在子宫着床位点处胚胎周围的基质细胞中表达, 介导着床和蜕膜化过程.由COX-2和微粒体型前列腺素E合成酶-1途径来源的前列腺素E 2 (prostaglandin E2, PGE2)在胚胎着床和蜕膜化过程中起重要作用.子宫中产生的前列腺素I 2 (prostaglandin I2, PGI2)通过核受体过氧化物酶体增殖因子活化受体δ(peroxisome proliferator-activated receptorδ,PPARδ)在胚胎着床过程中起关键作用.质膜上的前列腺素转运蛋白(prostaglandin transporter, PGT)通过转运新合成的前列腺素, 来满足胚胎着床和蜕膜化过程中对前列腺素的需求, 并维持前列腺素的代谢平衡.     

DBP对斜生栅藻及天然混合藻类致毒效应研究

作为塑料和橡胶等化工产品的增塑剂,邻苯二甲酸酯类化合物的生产量和使用量在我国和世界上均呈上升趋势,其在环境中的广泛存在及其所产生的行为效应已引起人们的高度重视。       

Unconditional and conditional QTL analysis of kernel weight related traits in wheat (Triticum aestivum L.) in multiple genetic backgrounds

Wheat thousand kernel weight (TKW) is a complex trait, and is largely controlled by several kernel traits, including kernel length (KL) and kernel width (KW). In order to reveal the genetic relationship between TKW and these kernel traits (KW and KL) as accurate as possible, we applied both unconditional and conditional mapping analyses to three distinct genetic populations, one DH population and two RIL populations. This report describes the identifications of 36 unconditional and conditional additive QTLs and 30 pairs of unconditional and conditional epistatic QTLs, all of which are closely associated with TKW. While the conditional additive locus Qtkw1B, detected in the RIL2 population, exhibited the largest contribution, explaining 14.12 % of TKW variance, the unconditional epistatic QTLs Qtkw3A-2/Qtkw5B.1, detected in the DH population, accounted for 11.95 % of phenotypic variance. This study also showed that, compared with unconditional mapping, conditional mapping resulted in very different numbers and different extent of effects of additive and epistatic QTLs that were associated with TKW when TKW was conditioned on kernel traits (KW and KL). These data strongly suggest that KW and KL indeed play a significant role in determining TKW. Furthermore, we demonstrated that the effects of the 25 additive QTLs for TKW were either entirely or largely determined by KW, while the effects of the other 25 additive QTLs for TKW were either entirely or largely affected by KL. We conclude that the conditional mapping can be useful for a better understanding of the interrelationship between the yield contributing traits at the QTL level.