Study on the Changes of Reproductive Hormone and Regulation of Follicle Development During the Reproductive Cycle of Yili Goose in Xinjiang

This experiment was aimed to study the changes of reproductive hormone and regulation of follicle development during the reproductive cycle of Yili goose in Xinjiang. 2 years old Yili goose were chosen which were in good health and similar weight. 32 samples were randomly selected to take blood samples for hormone detection during the laying, broodiness and ceased periods, and 15 samples were randomly selected to gather ovarian tissue for the observation of the development of ovary and follicular. The results showed that during the laying period, the GnRH of the Yili goose was extremely significantly higher than the broodiness and ceased periods of 16.78% and 58.29% (P<0.01);PRL was significantly lower than the broodiness period of 13.00% (P<0.05), and was extremely significantly higher than the ceased period of 28.94% (P<0.01); FSH was higher than the broodiness period of 6.98% (P>0.05),and was extremely significantly higher than the ceased period of 21.12% (P<0.01); LH was extremely significantly lower than the broodiness period of 8.38% (P<0.01),and was extremely significantly higher than the ceased period of 16.84% (P<0.01); E₂ were extremely significantly higher than that the broodiness and ceased periods of 29.80% and 112.40% (P<0.01); P₄ levels were extremely significantly higher than the broodiness and ceased periods of 28.89% and 30.34% (P<0.01). The ovary volume and weight of Yili goose were extremely significantly higher than that of broodiness and ceased periods (P<0.01). In the laying period, the mature follicles of Yili goose were significantly larger than that of the broodiness and resting periods, the number of secondary follicles was more and the number of primary follicles was lesser. Ovarian growth and mature follicle atresia, granule layer shrinkage, inward depression, cytoplasmic cavity, follicular atrophy at all levels in the broodiness period. The follicle cytoplasmic cavity of the ovary was larger in the ceased period than broodiness period, and inward concave further deeper, a large number of primordial follicles evenly arranged. Thus, during the laying period, the responses of GnRH, E₂ and LH of Yili goose were active and played a leading role on the development of ovarian and follicular. PRL and LH maintained a high level of secretion, cooperated to maintain the broodiness behavior during the broodiness period.     

不同基因型燕麦内源激素与灌浆期生理特性之间的关系

为探究内源激素含量对燕麦灌浆过程的影响,分别于2020和2021年,以9个不同基因型的燕麦品种为试验材料,设置大田试验,测定灌浆粒重、灌浆期光合特性、旗叶碳代谢酶(蔗糖磷酸合成酶SPS、蔗糖合酶SS)活性、生长素(IAA)、赤霉素(GA₃)、玉米素核苷(ZR)、脱落酸(ABA)含量及成熟期粒重,通过方差分析和聚类分析,探究不同基因型燕麦灌浆期生理特性、内源激素差异。结果表明：不同品种间,内源激素含量及其他生理特性差异均达显著水平(P<0.05),按照灌浆粒重,将供试的9个品种分为灌浆较强和较弱两类,其中灌浆较强品种到达灌浆盛期的时间较早,灌浆启动时间也早于其他品种;灌浆粒重拟合程度较好,灌浆过程中的净光合速率、碳代谢酶活性较高,粒重优于其他品种;灌浆较强品种单穗粒重较灌浆较弱品种高11.8%～176.5%;灌浆较强品种旗叶IAA、GA₃、ZR含量较灌浆较弱品种高12.6%～118.2%、7.2%～98.0%、21.4%～72.2%,(GA₃+ZR+IAA)/ABA较灌浆较弱品种高39.3%～311.9%。在各内源激...     

番茄单性结实研究进展

对番茄单性结实资源、评价鉴定方法、子房内源激素水平、分子机制及新品种选育等的研究现状进行了综述,尤其对近几年分子水平的最新研究进行了评述,对今后这一领域的研究做了展望。     

不同浓度激素对胡萝卜愈伤组织诱导的影响

研究了不同浓度激素组合对胡萝卜愈伤组织诱导的影响.结果表明:低浓度使用单一激素时,胡萝卜愈伤组织诱导率随着激素浓度的升高而升高;当2,4-D浓度超过2.5 mg/L时,随着浓度的升高,对胡萝卜愈伤组织诱导影响不明显;当6-BA浓度超过0.5 mg/L时,胡萝卜愈伤组织诱导率随着浓度的升高而降低.当2,4-D与6-BA搭配使用时,愈伤组织诱导率明显上升,当2,4-D浓度为1.5～2.0 mg/L、6-BA浓度为0.5～0.8 mg/L时,愈伤组织生长极快,诱导率最高.     

氯康唑类似物的合成及抑菌活性

为了发现更多抑菌活性优于抗菌药物盐酸氯康唑的化合物,在盐酸氯康唑的结构基础上,设计、合成了其类似物,并进行了抑菌活性测定。以芝麻酚为原料,经过酰化、1,2,4-三氮唑基团的引入以及醚化3步反应,合成了19个新型氯康唑类似物4a~4s。所有目标化合物的结构均经过1H NMR、13C NMR和ESI-MS等确认。采用抑制菌丝生长速率法测定了目标化合物对水稻稻瘟病菌、番茄早疫病菌、马铃薯干腐病菌、玉米弯孢病菌、烟草赤星病菌、小麦赤霉病菌和棉花枯萎病菌7种植物源病原真菌的抑制活性,并进一步测定了部分化合物的EC50值。结果显示,在50 μg/mL时,大多数目标化合物对供试菌株表现出不同程度的抑制作用。其中,化合物4d和4m对番茄早疫病菌的EC50值分别为6.28和4.61 μg/mL,4m对烟草赤星病菌的EC50值3.58 μg/mL,与对照药剂腈菌唑（对番茄早疫病菌和烟草赤星病菌的EC50值分别为1.63和1.05 μg/mL）在同一数量级,具有开发为新型抗菌药物的潜能。     

4-取代嘧啶基苯磺酰脲类化合物的合成与除草活性

为了探寻磺酰脲类除草剂的构效关系,以单嘧磺隆和单嘧磺酯为先导化合物,在嘧啶环上引入取代苯基,设计合成了16个新型单取代嘧啶磺酰脲衍生物,其结构均经过核磁共振氢谱、质谱和元素分析确证。盆栽试验结果表明:在1.5 kg/hm2时,大部分化合物对供试杂草具有一定的抑制活性,其中对双子叶杂草的活性高于对单子叶杂草的活性,但均不及先导化合物的活性。     

女人每月有两个性欲高峰

据报道,女性达到性高潮的时间,大多集中在月经到来的前后。有观点认为,女性的这种性欲变化,与月经周期中雌孕激素的规律性分泌有关。即随着卵泡成熟,雌激     

山东大学揭示植物激素油菜素内酯调控气孔运动新机制

2020年2月12日,山东大学生命科学学院白明义研究组报道了植物甾醇类激素——油菜素内酯(Brassinosteroid,BR)和过氧化氢(H2O2)相互依赖促进保卫细胞中的淀粉降解,进而促进气孔开放的研究结果。研究显示,野生型植物气孔中的淀粉在见光后迅速降解,而在BR缺失和不敏感突变体的气孔中淀粉大量富集,且见光后不能降解,使得气孔不能正常开放。     

干旱胁迫条件下不同抗旱性苹果砧木内源激素含量的变化

以抗旱性差异显著的两种苹果砧木楸子(Malus prunifolia)和平邑甜茶(Malus hupehensis Reld)为材料,研究了干旱胁迫对两种砧木根和叶中脱落酸(ABA)、生长素(IAA)、赤霉素(GAs)和玉米素核苷(ZR)含量的影响.结果表明:干旱胁迫下,与非抗旱砧木平邑甜茶相比,抗旱砧木楸子中抑制生长...