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Search Results: 1 - 10 of 286220 matches for " <br>贺学礼 "
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Effects of AM fungi on the growth and protective enzymes of cotton under NaCl stress
NaCl胁迫下AM真菌对棉花生长和叶片保护酶系统的影响

HE Xue-Li,<br>
生态学报 , 2005,
Abstract: The effects of AM fungi on the growth and protective enzymes in cotton plants inoculated Glomus mosseae and Glomus caledonium under salt-caused stress conditions was studied at the levels of 0,0.1%,0.2%,0.3% NaCl added to the soil for the potted plant. The results showed that application amount of NaCl significantly influenced the growth of cotton plants and inoculation effect of AM fungi. After inoculation mycorrhizal infection rate was promoted, and total dry weights and output of cotton were increased, w...
Effects of the growth of clonal plants on the diversity of AM fungi and mycorrhizal formation in Mu Us sandland
毛乌素沙地克隆植物生长对AM真菌多样性和菌根形成的影响

ZhaoJinLi,<br>赵金莉,
生态学报 , 2010,
Abstract: The research investigated the effects of the growth of clonal plants on the diversity of AM fungi and mycorrhizal formation over two years at two representative sites, OSES and RSCF, from north to south, in Mu Us sandland. The clonal plants were Psammochloa villosa and Hedysarum leave. The results showed that the ability of clonal plants to increase the diversity of AM fungi and mycorrhizal formation differ between plant species and sampling sites. After P. villosa invasion, the Shannon-Weiner index of AM fungi rose in both sampling sites. Additionally, the spore density level, the colonization rate of hyphae and arbuscules, the total colonization rate and colonization rate of vesicles all significantly increased. After H. leave invasion, the Shannon-Weiner index of AM fungi rose in OSES but descended in RSCF. At both sites, the spore density and colonization rate of arbuscules significantly increased and, at each, the colonization rate of vesicles rose to a maximum then declined. At OSES the hyphae and total colonization rate rose to a maximum and remained but at RSCF these values declined significantly after peaking.
Seed Coat Patterns in the Genus Hedysarum L.(Leguminosae) from China with Their Systematic Significance
中国岩黄耆属(豆科)种皮纹饰及其系统学意义

Hongliang Tang,Xueli He,<br>唐宏亮,
植物学报 , 2007,
Abstract: The seed coat patterns of 18 species (3 populations) of Hedysarum L. from China were examined under scanning electron microscope. Survey results revealed that seed coat patterns have important taxonomic significance at the species level,thus, the patterns were proposed as an attribute for taxonomical study of Hedysarum Two types of patterns, including smooth and coarse, and five sub-types, including favulariate, ruminate, areolate, reticulate and finely reticulate, were recognized on the basis of their microsculpturing features. These pattern types reflect evolutionary trends from the favulariate through the finely reticulate to the present smooth type, which verifies that seed coat patterns play an important role in Hedysarum phylogeny. Not all species of Hedysarum were investigated here, and others may display different testa patterns. Therefore, the present study was limited for Hedysarum phylogeny study.
SPATIAL DISTRIBUTION AND COLONIZATION OF ARBUSCULAR MYCORRHIZAL FUNGI IN THE RHIZOSPHERE OF DESERT SHRUBS
荒漠植物根际AM真菌的空间分布和定殖

Stanislov MOURATOV,YOSEF Steinberger,<br>
植物生态学报 , 2002,
Abstract: This study assesses and compares the response of AM fungi to plant species and its abiotic environment by analysing soil samples collected in a field study at Negev Desert of Israel. Soil samples in the rhizosphere of Zygophyllum dumosum, Hammada scoparia, Artemesia herba-alba and Atriplex halimus were collected in 4 replicates and divided a depth of 50 cm into 5 sections, i.e. 0-10, 10-20, 20-30, 30-40 and 40-50 cm in the rhizosphere of each plant. Before processing, soil samples were sieved (2 mm mesh size) and root segments were collected from each sample.Subsamples from each replicate were used for soil moisture, organic matter and total soluble N determination. The total AM fungal spore number was determined by wet sieving (45-500 μm) and sucrose density centrifugation,and counting under a stereoscopic microscope at ×40. Root samples were cut into 1 cm long pieces, then cleared with 10% (w/v) KOH and stained with 0.05% (v/v) trypan blue in lactophenol. Colonization assessment was conducted on each sample by the glass slide method on which 50 randomly selected 1 cm root segment units were determined microscopically. The results showed that different plant species significantly affected AM fungal colonization and spore density. Higher spore density tended to be correlated with higher AM fungal colonization in the rhizosphere of A. herba-alba and A. halimus, and vice versa for Z. dumosum and H. scoparia.At the tested soil depths, the highest AM fungal colonization occurring at the 20-30 cm section did not coincide with higher spore density existing at the 10-20 cm section. Sampling depth of soil had a significant effect on spore density and the percent colonization of total, vesicle and arbuscule. Spore density had a positive correlation with vesicular colonization and a negative correlation with arbuscular colonization. Soil total soluble N exhibited a negative effect on spore density. Soil moisture and organic matter content did not exhibit a significant correlation with AM fungal colonization or spore density. The distribution and colonization of AM fungi, especially spore density, vesicular and arbuscular colonization are a useful indicator for monitoring the change of desert soil ecosystem and evaluating the ability of forming mycorrhizae of different plant species.
The spatio-temporal distribution of arbuscular mycorrhizal fungi in the rhizosphere of Ammopiptanthus mongolicus from Shapotou
沙坡头地区沙冬青AM真菌的时空分布

HeXueLi,<br>,刘雪伟,李英鹏
生态学报 , 2010,
Abstract: The study assesses the spatio-temporal distribution of AM fungi and the relationships between AM fungi and soil factors by analyzing soil samples collected at Shapotou of Ningxia. Soil samples in the rhizosphere of Ammopiptanthus mongolicus (Leguminosae) were divided to a depth of 50 cm into 5 sections of 10 cm each. Four replicates at each depth were taken during May, August and October 2007. Three genera and 12 species of AM fungi were isolated from the soil samples: Gigasporn, 6 species; Acaulospora, 4 species; and Scutellospora 2 species. All were collected in every sampling period. The greatest spore density and vesicular colonization levels were found in August, and the highest arbuscular, hyphal and total colonization levels were found in October. Soil sampling depth had a significant effect on spore density and percent colonization levels of AM fungi. The greatest colonization and spore density levels were found in the first three layers, between 0-30 cm. Spore density had a positive correlation with soil organic matter, available N and pH. Hyphal and total colonization had a positive correlation with soil pH, available N and P. The distribution and colonization of AM fungi is a useful indicator for monitoring the changes of a desert soil ecosystem and evaluating the ability of mycorrhizae to form a relationship with the host plant.
The spatio\|temporal distribution of arbuscular mycorrhiza fungi and glomalin in the rhizosphere of Artemisia ordosica in desert
荒漠油蒿根围AM真菌与球囊霉素的时空分布

CHENYING,HE Xue-li,and,<br>陈颖,,山宝琴,赵丽莉
生态学报 , 2009,
Abstract: In this paper, the spatio\|temporal distribution of arbuscular mycorrhiza (AM) fungi and glomalin in rhizosphere of Artemisia ordosica and its relationship with soil factors were investigated in sand soil north to Yulin city, Shanxi, China. In April, July and October, 2007, soil samples around rhisophere of A.ordosica were collected. Each time, the soil was divided into five layers on the basis of depth from top to bottom: 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm, 40-50 cm, respectively. The results showed that the total colonization rate (89.54%), vesicular colonization rate (26.24%) and arbuscule colonization rate (21.08%) of AM fungi were very high around rhisophere of A.ordosica, and spore number was 2.91-6.17 per gram soil, indicating that AM fungi established well symbiosis with rhisophere of A. ordosica. Twenty\|one species of AM fungi in four genera were detected in soil samples, the predominant genera and predominant species was Glomus and G. geosporum, respectively. Distribution of AM fungi and glomalin was remarkably heterogeneous and closely related with soil factors. Hypha colonization increased gradually with season. Vesicular colonization rate and arbuscule colonization rate were at their lowest level in summer and higher in spring and autumn, seasonal variation of spore density was in a reverse pattern. Total extractable glomalin (TEG) was negatively correlated with soil depth, the highest value was in surface (0-20 cm) layer. Easy\|extracted glomalin (EEG) content showed a fluctuation with soil depth. The TEG content was high in spring and decreased in summer and autumn. TEG and EEG were remarkably correlated with soil nutrition, soil enzyme activity and spore density of AM fungi, in future research, they can be used as parameters to monitor the development of AM fungi community, organic carbon dynamic and nutrition cycle in sand soil.
A New Species of the Genus Hedinia Ostenf.(Cruciferae) from Xizang
藏荠属一新种

He Xue-li,An Zheng-xi,<br>,安争夕
中国科学院研究生院学报 , 1996,
Abstract:
Diversity of arbuscular mycorrhizal fungi associated with clonal plants in Mu Us Sandy Land
毛乌素沙地典型克隆植物根际AM真菌多样性研究

ZHAO Jin-Li,HE Xue-Li,<br>赵金莉,
中国生态农业学报 , 2013,
Abstract: Arbuscular mycorrhizal (AM) fungi is important in maintaining the functions and biodiversity of arid-land ecosystems and is also an indispensable factor in the restoration and reestablishment of vegetation. In particular, AM fungi are ubiquitous symbiotic fungi and plants. Clonal plants possess wider ecological neighborhoods than non-clonal plants. Clonal plants constitute a form of resource for the restoration of the Mu Us Sandy Land. Clonal plants have been identified as the driver of change in community environments and greatly contribute to the maintenance of community functions in the restoration process of vegetation. Clonal plants considerably enhance the ability of self-rehabilitation of sandy landscapes. To elucidate species diversity and ecological distribution of AM fungi associated with 3 kinds of clonal plants (Psammochloa villosa, Hedysarum leave, Artemisia ordosica) in Mu Us Sandy Land, two representative sites (Research Station and Yulin) were selected from the northeast and southwest of Mu Us Sandy Land. Soil samples at 50 cm depth of rhizosphere of clonal plants were collected in 4 replicates at each location and divided into sections corresponding to 0~10 cm, 10~20 cm, 20~30 cm, 30~40 cm, 40~50 cm depths in May, July and October 2006. A total of 23 AM fungal species belonging to 4 genera were isolated and identified. Of these, 15 species belonged to Glomus, 5 to Acaulospora, 2 to Gigaspora, and 1 to Scutellospora. G. mosseae was the dominant species in the P. villosa rhizosphere; G. melanosporum was the common species in the rhizosphere of 3 kinds of clonal plants. The ecological distributions were different among species and AM fungi genera. AM fungi spore density, species richness and species diversity index were highest in H. leave rhizosphere in the Research Station. The results showed that AM fungal species diversity was rich in clonal plant rhizospheres in Mu Us Sandy Land. Also the spatial distribution dynamics of AM fungal species in Mu Us Sandy Land was significant. This paper described the diversity and distribution of AM fungi in the rhizospheres of three kinds of clonal plants, which provided the basis for reestablishing ecosystems and sustaining economic development in Mu Us Sandy Land.
Diversity of arbuscular mycorrhizal fungi in the rhizosphere of Caragana korshinskii Kom. in desert zone
荒漠柠条锦鸡儿AM真菌多样性

HE Xueli,CHEN Zheng,GUO Huijuan,CHEN Cheng,<br>,陈烝,郭辉娟,陈程
生态学报 , 2012,
Abstract: Arbuscular mycorrhizal(AM) fungi play an important role in maintaining the ecosystem function and plant biodiversity in arid lands,and serving as the indispensible factor in the restoration and reestablishment of vegetation.AM fungi are widely distributed in global terrestrial ecosystems and play a bridge role in the cycle of nutrient material between plant and soil.Many studies on the survey of AM fungi resources,ecological distribution,symbiotic relationship and AM fungi related with different environmental factors had been conducted now.Caragana korshinskii Kom.was widely used for vegetation rehabilitation for its high ecological and economic values in China.In addition,it has certain features such as the ability that easy to sprout and forest,rooted deep and the strong resistance to stress.And it also has nodule formation so that can help restore degraded land by atmospheric nitrogen fixation and improve the soil structure and ecological environment.In order to elucidate the diversity and distribution of AM fungi associated with the major desert plant Caragana korshinskii Kom.in desert zone.In July 2010,the soil samples were collected from a depth of 50cm in the rhizosphere of Caragana korshinskii Kom.and were divided into five depth intervals: 0—10,10—20,20—30,30—40,40—50cm in three sampling sites in the desert zone of Hebei and Inner Mongolia province north China including Duolun Lake,Hei Chengzi and Er Yangdian.The annual precipitation,average altitude and coordinate of Duolun Lake were 384.5mm,1312m and N42°11′601″E116°36′870″respectively;of Hei Chengzi were 250-350mm,1321m and N42°09′817″,E115°56′107″;of Er Yangdian were 426mm,1386m and N41°51′095″,E115°47′657″.In this study,24 AM fungal species from four genera were isolated in three sampling sites.In these species,16 species belonged to Glomus,five to Acaulospora,two to Scutellospora and one to Diversispora.Glomus was the dominant genus and Acaulospora was the subdominant genus in the three sampling sites.G.reticulatum was the dominate species in Duolun Lake and Hei Chengzi,and was the subdominant species in Er Yangdian;G.melanosporum was the dominate species in Hei Chengzi and Er Yangdian,and was the subdominant species in Duolun Lake.Spore density of AM fungi in Er Yangdian was the highest,and had no obvious differences between Duolun Lake and Hei Chengzi.Spore density had a significant positive correlation with the available N,soil organic carbon and available P,and the available N was the highest.The results showed that the diversity of AM fungal species was rich in the rhizosphere of Caragana korshinskii Kom.,and they had significant spatial distribution dynamics.The paper described the diversity and distribution of AM fungi in the rhizosphere of Caragana korshinskii Kom.,so that it will provide great help to ecosystem reestablishment,isolation of dominate species and sustainable economic development in desert zone.
陕西麦田杂草及植物区系研究
刘俊,
麦类作物学报 , 1995, DOI: 10.7606/j.issn.1009-1041.1995.04.083
Abstract: 陕西麦田杂草共有17科、55属、67种,对小麦的生长危害较重。区系成分多样,温带成分明显,世界分布和热带成分占相当数量,并有地中海-西亚-中亚和东亚区系成分渗入,这与陕西麦田的生态分布状况相一致。
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