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Twenty-eight prototrophic revertants of the tryptophan auxotrophs were obtained through spotaneous back mutation from colonies grown on synthetic medium plates or nodules of plants. Most of the revertants have resumed the nodulation abilities and enhanced nitrogen fixation activities as evidenced by darker green color, higher dry weight and more nitrogen contents in shoot than those of the wild type strain 8-1-4A did in pot experiments. However, noodulation abilities decreased to some extent and no significant differences were found in the mass of nodules compared with the parent strain.

通过自发回复突变,从培养平板和根瘤中分离到28个色氨酸原养回复突变型菌株,对其中25株进行植物盆栽试验证明其中24株菌的结瘤功能得到了恢复,而且固氮酶活性普遍比出发菌有所提高,其中41%达到极显著水平,18%达到显著水平,植株地上部分干重及含氮量也有不同程度的提高,唯有根瘤数比出发菌有所降低,其中23%降低达极显著水平,11%降低达显著水平。

With pot experiment,the effects of drought stress on tomato growth index and physiological character,the compensation effects of rewater on tomato growth and yield was researched in seeding stage.

通过盆栽试验,研究了苗期干旱胁迫对番茄生长发育以及生理特征的影响以及干旱后复水对番茄生长形态和产量等的补偿生长效应。

This paper studied the effects of different anion species(Cl-, SO42-), concentrations and Cd level on Cd absorption of spinach Spinacia oleracea )through pot experiment.

通过盆栽试验,研究了不同种类与浓度的阴离子(Cl-, SO42-)以及不同镉水平对菠菜镉吸收的影响。

A pot culture experiment was designed to study the interactive effect of sodium chloride and water stress on the growth and osmotica of Suaeda salsa.

采用盆栽土培的方法,研究了不同干旱条件下盐胁迫对盐地碱蓬生长及其渗透调节物质的影响。

And the avenge height, basal diameter, branch number and mortality rate of Tamarix chinensis was detected after growed for 50 days.

方法]在东营盐生植物园的盐池进行盆栽和田间耐盐试验,测定柽柳生长50d后的平均株高、地径、分枝数和死亡率。

In a pot experiment with spring wheat and buckwheat as test crops and with thiophosphric triamide and dicyandiamide as test inhibitors, the transformation, regulation and residual effect of 〓N-labelled urea were studied.

采用〓N标记的尿素,以N-丁基硫代磷酰三胺和双氰胺为供试抑制剂,春小麦和荞麦分别为供试作物进行尿素N转化的调节及其残效盆栽试验。

A pot experiment was conducted with two soybean varieties (Di2003-1 and Hefeng25) and two main soil types in Heilongjiang Province to study the interactive effects of variety and soil type on the root morphology and nodule traits of soybean plants. Root samples were collected at the fifth trifoliolate stage, bloom-beginning stage, pod-beginning stage, full pod stage, seed-beginning stage, full seed stage, and full maturity stage for the analysis of root dry mass, root length, root surface area, average root diameter, nodule number, nodule fresh mass, and mass per nodule.

选取黑龙江省2种主要农田土壤类型和2个大豆品种(滴2003-1和合丰25),采用盆栽试验,分别于大豆第5片复叶展开期、初花期、结荚初期、结荚盛期、鼓粒初期、鼓粒期和完熟期取样,进行根系形态(根干质量、根长、根表面积和平均根直径等)和根瘤性状(根瘤数、根瘤鲜质量和单个根瘤质量)的动态分析,以研究品种和土壤类型对大豆根系形态特征的影响。

Influence of different contents of Cd in soil on the growth and yield of triticum aestivum as well as the accumulation of Cd under a potted experiment has been studied.

中文摘 要:采用盆栽试验的方法,研究了土壤中不同镉浓度对小麦生长、结实及重金属镉富集的影响。

Longipes collected from Hengyang, hunan province as the experimental materials, the characters of physiology and biochemistry were determined in different drought condition through unwatered potted plant and compared with normal watering.

的幼苗为材料,通过盆栽干旱胁迫,以正常浇水处理为对照,对不同干旱胁迫下的部分生理生化指标进行了测定。

Results show that application of the two manures increased biomass of the shoots of amaranth, but decreased its As, Cu and Zn content.

在水稻土和赤红壤中分别以2%和4%比例施入含As、Cu和Zn的鸡粪和猪粪,以不施肥为对照进行苋菜盆栽试验,研究施入粪肥对土壤As、Cu和Zn有效性的影响。

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