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《分子植物育种》2021,19(16):5389-5397
为研究青蒿素合成的关键酶基因AaADS过表达对黄花蒿腺毛发育和青蒿素含量的影响,本研究根据GenBank收录的黄花蒿AaADS基因启动子和cDNA序列设计引物,采用同源克隆的方法从黄花蒿品种(428-A)中扩增出AaADS基因启动子和cDNA序列。构建GUS报告载体AaADSpro::GUS和植物表达载体AaADSpro::AaADS,利用农杆菌介导的叶盘转化法转化黄花蒿。通过对转基因植株叶片腺毛的GUS基因活性检测和不同组织器官AaADS基因RT-PCR半定量分析,以及过表达AaADS基因的植株叶片下表皮腺毛荧光显微观察、统计和植株青蒿素含量的测定,结果表明:AaADS基因能在黄花蒿腺毛细胞中高效表达;转基因植株中AaADS基因表达量明显高于对照,且在叶片组织表达量最高;转基因植株叶片腺毛细胞较对照植株明显增大,过表达AaADS基因植株中青蒿素含量达27.3 mg/g DW,比对照植株中青蒿素含量12 mg/g DW提高了2.3倍。本研究说明AaADS基因过表达能有效促进黄花蒿腺毛细胞的生长和青蒿素的生物合成,为选育高青蒿素含量的黄花蒿新品系提供可行性方法。 相似文献
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重庆青蒿中青蒿素含量及其AFLP分析 总被引:2,自引:0,他引:2
本文对重庆地区酉阳县、沙坪坝和北碚的10个主要青蒿类型进行了青篙素含量测定及其AFLP分析.研究结果表明:不同的青蒿株系青蒿素含量不同,栽培株系和色茎株系青蒿素含量较高;进一步的AFLP分析表明引物组合EA04-MC05和EA01-MC01分别在高产青蒿株系和茎色青蒿株系中均能扩增出一条特异性条带;根据AFLP差异带,用WPGMA法对10个主要青蒿类型进行聚类分析,结果没有得到与青蒿素含量的明确关联,只是从产地上将酉阳青蒿与北碚、沙坪坝青蒿区分,说明不同地区青蒿的遗传差异较大.本文通过研究影响青蒿素含量的环境因素和遗传因素,为进一步克隆青蒿素合成相关基因提供参考. 相似文献
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黄花蒿是治疗痢疾的特效中药,近缘种与黄花蒿混杂出售严重影响了黄花蒿质量。本研究采用傅里叶红外光谱法(FTIR)和DNA条形码对黄花蒿及近缘种进行了鉴定。FTIR分析结果表明,黄花蒿及其近缘种中芳香类、酰胺类及萜类化合物种类多、含量丰富。黄花蒿及其近缘种的二阶导数图谱可将黄花蒿与其混淆种区分开。红外光谱进行系统聚类分析后,6个物种可分为两组,黄花蒿为一组,其余5个种聚为一组。候选的4条序列(ITS,ITS2,rbc L,psb K-psb I)中,ITS2序列具有较好的PCR扩增成功率和测序成功率,在所考察的候选序列中种间变异和种内变异较高,种间变异大于种内变异,两者形成了较为明显的Barcoding gap区。FTIR辅以ITS2序列将可精准地鉴别中药材黄花蒿。 相似文献
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以绿豆种子为受体,采用室内生测法,探讨黄花蒿不同部位水浸提液对绿豆种子的萌发率、幼苗生长及叶绿素含量的影响。结果表明:黄花蒿各部位(根、茎、叶)水浸提液随处理浓度增加,对绿豆的化感效应增强,对种子萌发的抑制强弱为:叶>茎>根,且随处理浓度升高,发芽率降低;对幼苗的根系生长表现为低浓度(20mg/mL根、茎水浸提液)促进,当浓度高达40mg/mL均有明显抑制作用;幼苗高度总体降低,最高降幅分别为46.29%,47.67%和56.48%;叶绿素a和叶绿素b的含量也不同程度减少。可见黄花蒿影响绿豆种子萌发及幼苗生长,因此大面积栽培黄花蒿或绿豆种植应考虑黄花蒿的化感效应。 相似文献
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利用生物性状检测青蒿的遮阴性能 总被引:1,自引:1,他引:0
试验采取盆栽,三次重复,以2个不同青蒿为材料,在遮阴和正常两个条件下,利用生物性状检测青蒿的遮阴性能。结果表明,遮阴条件下,青蒿地上部干重、地下部干重、株高、叶面积、叶绿素含量、类胡萝卜素含量和青蒿素含量均减少,经过方差分析,2个青蒿材料各项指标遮阴和正常两个条件下差异显著, 青蒿叶片青蒿素与地上部干重、叶绿素含量和类胡萝卜素达1%显著相关。 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献
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The cotyledon and hypocotyl of eight varieties of alfalfa( Medicago sativa L. )are used to study the effect of different cultivation procedures and genotypes on embryogenic callus and embryoid induction,plant development and transplant of alfalfa.The varieties of alfalfa with high embryoid induction rate and high differentiation rate are screened. A high frequency regeneration system for alfalfa tissue culture is established:which is benifical to the gene transformation of alfalfa. 相似文献