In meiosis the pollen mother cells that abnormally acted made up about 10.28 % and the male gametophytes abnormally acted at a frequency of 3.2 % and mainly aborted at uninucleate stage .

减数分裂过程中染色体行为异常的花粉母细胞约占10.28%；雄配子体发育过程中异常频率约为3.2%，败育主要发生在 单 核期。

The results showed that the microspore abortion occurred at the stage of microspore mother cell tetrads and uninucleate microspore .

结果表明，小孢子的败育发生在小孢子母细胞时期、四分体时期以及 单 核小孢子时期。

The mature female gametophyte comprise four cells ( an egg cell two synergids and a uninucleate central cell ) .

成熟雌配子体由4细胞组成，即2助细胞，1卵细胞和 1中央细胞。

The uninucleate Rhizoctonia found first in China had pathogenicity to turf-grasses and crops which should be researched more in future . 8 .

我国首次发现的 单核类丝核菌对主要草坪禾草和作物都具有致病性，今后应做进一步的深入研究。

Isolated Microspore optimal culture period is the microspores in the late uninucleate stage .

处于 单 核末期的小孢子为游离培养的最佳时期。

The pathogenicity of uninucleate Rhizoctonia to main turf-grasses and crops was evaluated .

测定了 单 核丝核菌对主要草坪禾草和作物的致病性。

The anthers of sterile plants ( homozygous and heterozygous ) lacked 2 isozyme bands of POD and COD compared with the fertile anthers and were 1 isozyme more band of EST than the fertile anthers at uninucleate stage .

在 单 核 期花药中，不育株（纯合与杂合）比可育株多1条EST、少2条POD和2条COD同工酶带，在 三 核 期 也 呈上述 特征。

The uninucleate microspore stages and B5 medium with sucrose from 6 % to 13 % were optimal for callus induction .

小孢子 单 核 期为适宜的诱导时期，培养基以6%～13%蔗糖浓度的B5培养基较好；

When the length of petal is 0 ~ 2mm longer or shorter than the base of the sepal split most microspores were at uninucleate stage . It 's suitable for isolated microspore culture of eggplant .

当花瓣长与花蕾萼裂基部之差在0～2mm时，花药内小孢子多数处于 单 核期，适于茄子游离小孢子的培养。

Therefore we inferred that the ectopic expression of AOX1 α in both uninucleate and binucleate anther stage was impacted on the pathway of cyanide-resistant respiration thus result in the abortion of anthers . 2 .

因此，推测AOX1α基因在生理型不育系 单 核 期和二核期的异常表达，可能影响了花药发育过程中抗氰呼吸途径，导致呼吸代谢紊乱，引起花药败育。

No fusion of the two nuclei in binucleate cells as well as the process of meiosis are observed . Most of the basidiospores are uninucleate and about 5 % are binucleate .

未见到双核的融合及减数分裂过程。绝大部分担孢子是 单 核的，有约5%的担孢子是双核的。

The intine of the pollen began to form in the middle stage of uninucleate microspore .

在 单孢花粉中期，花粉内壁开始形成。

Haploid plantlet and callus were induced from the anther culture of Dioscorea zingiberensis as the explant at the stag of later uninucleate period .

以 处于 单 核期的盾叶薯蓣花药为材料，经愈伤组织途径成功获得单倍体盾叶薯蓣新材料。

Cytological observation on the transgenic plants indicated that abortion of microspore development occurred at the stages of from tetrads to uninucleate .

通过对转基因植株进行细胞学染色、切片观察等方法，显示转基因后代小孢子败育发生在四分体到 单 核 期。

But it was reverse to the panicles under short day induction from 7.58 % at the late uninucleate stage to 40.58 % at the filling stage of pollen .

反之，在短日诱导的可育植株中，则从 花粉 单 核晚期的7.58%，增加到花粉充盈期的40.58%。

The results showed that it was necessary to isolate microspores in the late uninucleate stage .

结果表明： 单 核 靠边 期小孢子是 诱导 胚胎 发生 的 最佳时期；

The bands and activity of POD and EST isozymes of anther from T type male sterile line are fewer or lower than those from its maintainer after uninucleate stage .

而T型不育系POD和EST同功酶带数和活性 单 核期之后少于或低于保持系 同功酶。

The treatments such as the selection of 50-70 % late uninucleate microspores density of 1.5-2 buds / dish and addition of 0.3mg/ml activated charcoal are helpful to microspore embryogenesis in Chinese cabbage and purple flowering stalk .

选择 单 核 靠边 期比率为 50-70%的小孢子，将密度设为1.5-2个花蕾／ml，添加0.3mg／ml活性炭有利于大白菜和红菜苔小孢子胚胎发生。

Most of the basidiospores are uninucleate and about 5 % are binucleate .

绝大部分担孢子是 单 核的，有约5%的担孢子是双核的。

The pathogenicity of uninucleate Rhizoctonia binucleate Rhizoctonia Rhizoctonia solani 、 Rhizoctonia oryzae and Rhizoctonia zeae to main turf-grasses were tested .

10、本项研究测定了草坪褐斑病菌（包括立枯丝核菌、水稻丝核菌、 玉蜀黍丝核菌、禾谷丝核菌和 单核类丝核菌）对主要草坪禾草的致病性。

Based on extrapolated organ shape criteria we select ears that are in uninucleate period carry out pretreatment in a 6 ~ 8 ℃ low-temperature condition for about 12 days and callus induction rate can be enhanced in this way .

根据器官形态指标外推法选择 花粉 发育 处于 单 核 靠边 期 的 幼穗，进行6￣8℃低温预处理12d左右，可提高愈伤组织诱导率；

The microstructure of the lamella hymenia spore-bearing mycelia the filaments and powdery hyphae of the uninucleate and dicaryophytic hyphae were also described in detail .

以及菌 褶子实层、 单 核菌丝、双核菌丝中的丝状菌丝、粉状菌丝和产孢菌丝团的显微构造；