查询词典 cotyledon

Agrobacterium tumefaciens-mediated transformation system of Medicago truncatula cotyledonary-node explants Abstract The three-day-old seedlings of Medicago truncatula, which geminated in medium containing up to 5mg/L 6-BA, were used to prepare the cotyledonary-node explants which contained one cotyledon and 1-2mm of split hypocotyl. High-efficiency regeneration system of Medicago truncarula was developed by axillary shoot organogenesis of cotyledonary-node explants.

论文第二部分 Medicago truncatula遗传转化和植株再生体系的研究第一章根癌农杆菌介导的Medicago truncatula子叶节外植体转化系统的研究本文利用在高达5mg／L 6-BA的萌发培养基上生长3天的Medicago truncatula幼苗，制备获得由一片子叶和1-2mm切分的胚轴组成的子叶节外植体。

The cotyledon explants excised from 5-day-old germfree seedlings were cultured on the MS medium containing 1.0 mg/L 6-BA in darkness for 3 days, and then further cultured under light condition for induction of adventitious buds.

结果显示：将从5 d龄甜瓜无菌苗上切取的子叶外植体接种在MS+6-BA1 mg/L的不定芽诱导培养基上，黑暗条件培养3 d，再转至光下继续培养，诱导出高效不定芽丛。

Result The ordinary broad sense heritability rates of various traits were at extremely significant level, specially, that of bell weight, lint percentage, top stem thickness were more than 50% and that of the ginned cotton output per plant, bells per plant, plant height, stem thickness of cotyledon node were lower. The ordinary narrow sense heritability of the ginned cotton output per plant and bells per plant were 24% and 25% resp. and that of bell weight and lint percentage etc. were lower or zero.

结果］各性状的普通广义遗传率均达极显著水平，特别是铃重、衣分、顶部茎粗的普通广义遗传率达50%以上，单株皮棉产量、单株铃数、株高、子叶节茎粗普通广义遗传率较低，单株皮棉产量和单株铃数的普通狭义遗传力分别为24%和25%，铃重、衣分等性状的普通狭义遗传力较低或为0。

Kochia sieversiana can absorb Na~+ effectively and prevent excessive Na~+ from transporting tothe cotyledon.

碱地肤之所以适应在高盐环境生长的原因就是由于可以有效地吸收、控制Na~+向地上部分转移。

A systematic study was made on the induction of callus from terminal bud, cotyledon, plumular axis and the regenerated plantlets from terminal bud in Camptotheca acuminata Decne, and a large number of calli and cluster buds were obtained.

系统研究了以喜树顶芽、子叶、胚轴为外植体诱导愈伤组织的培养方法和以顶芽为外植体快速繁殖喜树的方法，获得了大量的愈伤组织和丛生芽。

The experiment result showed: when the medium was MS supplemented with 2,4-D2.0mg/L, BAl.0mg/L and NAA0.5mg/L, the callus induction rate of the cotyledon was 87.9%, the callus induction rate of the plumular axis was 82.9%, and the callus induction rate of the terminal bud was 6.7%.

实验结果表明在MS附加2，4-D2.0mg/L、BA1.0mg/L、NAA0.5mg/L的培养基上，子叶愈伤组织的诱导率为87.9％、胚轴的诱导率为82.9％、顶芽的诱导率为6.7％。

Cotyledon explants culture ; preculture procedure ; high frequency shoot regeneration ; Brasscia napus ; Brassica campestris

子叶离体培养；预培养程序；高频率芽再生；甘蓝型油菜；白菜型油菜

Subsequently,partitioning of cotyledon and shoot primordia in the upper layer of torpedo-stage somatic embryos took place.

随后鱼雷形胚上层分化形成芽原基和两个叶原基。

Fig. 5. Influence of pycnidiospore density in soil on the disease incidence of melon cotyledon caused by Didymella bryoniae .

图五、土壤中添加蔓枯病菌柄孢子对於香瓜子叶发病的影响。

The comparison test of this new methodwith spray inoculation method was conducted. The results showed the former method could increase the incidence ofdisease and uniformity than the latter one. Used cotyledon-brushing with conidial suspension and fungicide foliarspraying method, the EC 50 values of hexaconazole, myclobutanil, triadimefon, thiophanate-methyl and chlorotha lonil to Sphaerotheca fuliginea treated in different time after inoculation were determined; the results showed that 96 h was better time for disease severity evaluating.

比较了白粉病菌分生孢子悬浮液涂抹法和喷雾法接种黄瓜幼苗子叶的效果，结果表明，涂抹法发病率高，均匀度更好；测定了接菌后不同时间施药，白粉病菌对己唑醇、腈菌唑、三唑酮、甲基硫菌灵和百菌清等 5 种杀菌剂的敏感性，结果表明，接菌后 96h 施药较为敏感，测得的 EC 50 较小。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。