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Acropetal differentiation of the cambium layer continues as the primary root elongates.

形成层的向顶分化像初生根伸长一样在继续进行。

The effects of different pH value and heavy metal concentration on rooting of Alternanthera philoxeroides were studied.

研究不同pH值和不同重金属浓度对水花生生根情况的影响。

The study aimed to screen the media suitable to induction, differentiation and rooting of Amorphophallus albus.

[目的]筛选适合花魔芋生长的诱导、分化和生根培养基。

Sepals and petals 5, petals clawed, without apiculus; petals and stamens persistent after anthesis.

茎不生根。萼片和花瓣5,花瓣瓣爪,没有细尖;花瓣和雄蕊花后宿存。

They belong to Meloidogyne incognita or Meloidogyne arenaria.

因此,这12个根结线虫种群属于花生根结线虫或是南方根结线虫(M.incognita)。

The control effects and application methods of Pleurotus ostreatus on the peanut root knot nematode disease, Meloidogyne arenaria, were systematically studied in the greenhouse.

通过盆栽试验研究了杀线虫担子菌-粗皮侧耳对花生根结线虫病的防治作用及施用技术。

According to sequence cluster analysis of the the tested samples, it indicates that the gene distance of RKN-9, RKN-8, RKN-21, RKN-11, RKN-18 , RKN-20, RKN-17, RKN-22, RKN-23, RKN-24 and RKN-25 to Meloidogyne incognita and Meloidogyne arenaria was very close with homology of 100% and 99%, respectively.

根据25个根结线虫种群序列比对分析和聚类分析可知,河北廊坊的番茄根结线虫、安徽宿州的黄瓜和番茄根结线虫、安徽太和的桔梗根结线虫、安徽和县的番茄根结线虫、浙江杭州的黄瓜根结线虫、四川成都的番茄根结线虫、安徽泗县的黄瓜根结线虫和中国农业大学四个不同番茄品种上的根结线虫的序列之间同源性为100%;它们与花生根结线虫和南方根结线虫(M.incognita)的遗传距离最近,序列同源性分别达到100%和99%。

RDNA-ITS sequence analysis of 30 populations showed that there is difference among M. incognita, M. hapla, M. arenaria, M. javanica, M. panyuensis, M. zhanjiangensis. and M. hainansis, whereas little rDNA-ITS sequence difference among three normal Meloidogyne species.

通过对30个种群的rDNA-ITS序列分析,发现番禺根结线虫、海南根结线虫、北方根结线虫、湛江根结线虫、南方根结线虫、爪哇根结线虫和花生根结线虫种间的DNA-ITS区碱基序列存在差异,但后3种常见种之间差异小。

Pleurotus ostreatus ; Meloidgyne arenaria ; Peanut root knot nematode disease ; Biological control

粗皮侧耳;根结线虫;花生根结线虫病;生物防治

Adding activated carbon into culture medium could reduce the autotoxic effects on the second-batch seedlings.

接种于生根培养基和继代生长培养基上的二茬苗具有最明显的自毒抑制现象,其次是接种于初代培养基上的二茬苗,在培养基中添加活性碳可降低二茬苗受到的抑制。

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Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象,运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查,调查结果发现,石家庄市初中生物教师这一群体普遍存在职业倦怠,情感枯竭程度偏高,成就感偏低,去个性化程度最为严重。

In measurements of a day,generallyspeaking,the photosynthesis of birch in mesophytic habitat is better than that in xerophytichabitat(peak values are 12.8,10.33μmolCO2m-2s-1 respectively);that of sexual birch inmesophytic habitat is better than that of clone birch(peak values are 9.87,6.71μmolCO2m-2s-1respectively);that of young tree is better than that of seedling(peak values are12.37,10.05μmolCO2m-2s-1 respectively).

在一天中的各个时刻,总体说来,中生生境生长的白桦光合作用超过旱生生境生长的白桦光合作用(净光合速率峰值分别为12.8、10.33μmolCO2m-2s-1);白桦幼树的光合作用超过白桦幼苗(净光合速率峰值分别为12.37、10.05μmolCO2m-2s-1);中生生境有性白桦的光合作用超过无性白桦的光合作用(净光合速率峰值分别为9.87μmolCO2m-2s-1、6.71μmolCO2m-2s-1)。