检索结果-南通市图书馆

Maternal salinity environment affects salt tolerance during germination in Anabasis setifera： A facultative desert halophyte

引用

Journal of Arid Land 2016年第2期8卷 254-263页

作者： Ali EL-KEBLAWY Sanjay GAIROLA arvind bhatt Department of Applied Biology Faculty of Science and Sharjah Research AcademyUniversity of SharjahSharjah 27272the United Arab Emirates Department of Biology Faculty of Education in Al-ArishSuez Canal UniversityIsmailia 41522Egypt Sharjah Seed Bank and Herbarium Sharjah Research AcademySharjah 27272the United Arab Emirates Gulf Organization for Research&Development Doha 210162Qatar

The effects of maternal salinity and light incubation on the salinity tolerance of the facultative halophyte Anabasis setifera during their germination stages were assessed. Seeds were collected from non-saline habitats in Egypt and saline habitats in the United Arab Emirates （UAE）. The seeds of the two populations were germinated in 0, 100, 200, 400, 600 and 800 mM NaCI, and incubated at 25℃/15℃ in both 12-h light and 12-h darkness regimes and continuous darkness. Significantly more seeds germinated in the Egyptian population than in the UAE population. Salinity tolerance was significantly greater with the Egyptian population than with the UAE population, especially under the conditions of higher salinities. The difference in salinity tolerance between the seeds of two populations was attributed to their seed mass. In addition, germination was significantly faster for the Egyptian population than for the UAE population. Most of the saline treated seeds were able to recover their germination when transferred to distilled water, but this depended on their maternal salinity and light incubation. Recovery from higher salinities was significantly better for the seeds under darkness than for those under light in the UAE population, but the reverse was true for the seeds in the Egyptian population. The higher salinity tolerance for the A. setifera seeds from the non-saline Egyptian population and the lower salinity tolerance for the seeds from the saline UAE population cannot explain their natural distribution. Further studies about other possible roles, such as levels of different promoting and inhibiting phytohormones, are needed to understand the importance of salinity as an environmentally induced maternal effect.

关键词： Keywords: Anabasis setifera facultative halophyte germination maternal salinity seed mass

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Eco-physiological studies on desert plants: germination of Halothamnus iraqensis Botsch. seeds under different conditions

引用

Journal of Arid Land 2019年第1期11卷 75-85页

作者： arvind bhatt Narayana R BHAT Valentina MURRU ANDrea SANTO Kuwait Institute for Scientific Research University of Cagliari Independent Researcher

With the aim to investigate if the halophyte Halothamnus iraqensis Botsch. can be suitable for re-vegetation and remediation of salt-affected lands, this study evaluated(1) the effects of photoperiod, thermoperiod, storage period and wings' presence on its seed germination, and(2) the ability of its seeds to have successful germination recovery after salt stress. Germination tests in different photoperiods(12 h light/12 h darkness and total darkness) and thermoperiods(15℃/20℃ and 20℃/25℃) were conducted for seeds collected in 2012, 2013, 2014, 2015 and 2016. The seeds collected in 2016 were sown under different salinity levels(0, 100, 200, 400 and 600 m M Na Cl) to assess the salinity tolerance during the germination. Wings' presence highly inhibited seed germination of this species in both photoperiods and thermoperiods under all salinity level treatments. In addition, the germination recovery occurred well when seeds were deprived of their wings. The photoperiod of 12 h light/12 h darkness and the thermoperiod of 15℃/20℃ were the best conditions for seed germination. Germination percentages of H. iraqensis seeds decreased with the increasing storage duration, especially after three years of the collection. In addition, H. iraqensis seeds were able to germinate under different salinity levels, and their germination percentages decreased with increasing salinity levels. H. iraqensis seeds have the ability to recover their germination after alleviating the salt stress, irrespective of photoperiod, highlighting the halophilous character of this species.

关键词： wings’ presence storage period photoperiod thermoperiod salt stress Halothamnus iraqensis Botsch

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Germination strategies of annual and short-lived perennial species in the Arabian Desert

引用

Journal of Arid Land 2020年第6期12卷 1071-1082页

作者： arvind bhatt David J GALLACHER Paulo R M SOUZA-FILHO Lushan Botanical Garden Chinese Academy of SciencesJiujiang 332900China School of Life and Environmental Sciences The University of SydneyNarrabri NSW 2390Australia Multidisciplinary Center of Barra Federal University of Western BahiaBarra 47100-000Brazil

Germination timing is highly regulated in short-lived plant species since it strongly influences recruitment success of *** deserts,the spatiotemporal distribution of plant-available water is highly episodic and unpredictable,making winter months more favorable for seed germination when other abiotic conditions *** hypothesized that changes in photoperiod and thermoperiod would impact germination more in seeds that had undergone in situ *** assessed 21 annual and short-lived perennial species in the Arabian Desert to find(1)if seeds were dormant at maturity,(2)if in situ seed storage increased germination percentage compared with no storage,(3)if photoperiod and thermoperiod germination requirements were influenced by in situ storage,and(4)if a phylogenetic association in seed germination could be *** of each species collected in early 2017 were divided into two *** was tested for germination within one week(fresh seeds).The other was stored in situ at the maternal location(stored seeds)until October 2017 and tested for seed germination in the first week of *** germination was conducted in incubators at two thermoperiods(15℃/20℃ and 20℃/30℃;12 h/12 h),and two photoperiods(12 and 0 h light per day).Results indicated that seed germination percentages of 13 species were significantly enhanced by in situ storage.A thermoperiod response was exhibited by stored,but not fresh *** exposure increased germination of fresh seeds but had only a minimal effect on stored *** traits exhibited no phylogenetic *** result indicated that selection pressure for germination strategy was stronger than that for taxonomic traits of these desert species.

关键词： desert species dormancy germination light temperature phylogeny

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of Reproductive Potential of Different Populations of Angelica glauca Edgew.,a Critically Endangered Himalayan Medicinal Herb

引用

Journal of Mountain Science 2008年第1期5卷 84-90页

作者： Anil Kumar Bisht arvind bhatt R.S.Rawal Uppeandra Dhar G.B.Pant Institute of Himalayan Environment and Development Kosi-Katarmal Almora-263 643 (Uttarakhand)India

Angelica glauca is one of the important medicinal plants and it is widely used by indigenous communities for different purposes. The present study analyzes variability in reproductive characters of A. glauca. The reproductive parts were found having significant positive correlation with altitude (e.g.,number of umbellets /umber r= 0.857,p<0.05; umbel diameter r=0.735,p<0.05).

关键词： Angelica glauca critically endangered Himalaya medicinal plant population reproductive potential

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Inter-population variabilities in seed mass and germination of Panicum turgidum and Pennisetum divisum in the desert of Kuwait

引用

Journal of Arid Land 2020年第1期12卷 144-153页

作者： arvind bhatt Narayana R BHAT Afaf AL-NASSER María M CARÓN AndreaSANTO Kuwait Institute for Scientific Research Safat 24885Kuwait Laboratory of Botanical Research(LABIBO) Faculty of Natural SciencesNational University of Salta-CONICETSalta 4400Argentina Independent Researcher Selargius 09047Italy

Understanding variability in seed germination among populations is essential for planning an effective germplasm collection for restoration and conservation *** knowledge of germination and dormancy patterns among populations of desert grasses is crucial for determining the potential of the species and populations to be used for restoration and conservation as well as forage *** in seed germination of Panicum turgidum Forssk and Pennisetum divisum(Gmel.)*** the desert of Kuwait was evaluated in different populations in May *** of seed germination(25 seeds and 4 replicates)was conducted for each population at night/day temperatures of 15℃/20℃and 20℃/30℃under the following light condition:continuous darkness or 12 h/12 h light/*** showed that seed masses of both species strongly varied according to their seed provenances,and both species produced heavier seeds in population with a higher soil electrical *** germination percentage considerably varied between two species,and the variation in *** was greater(17%–49%)than that of ***(72%–93%).Germination percentage in *** was greater at high temperature(20℃/30℃)than at low temperature(15℃/20℃).However,temperature regimes had no effect on germination percentage of *** *** germination time of both species exhibited significant inter-population *** result is especially relevant to assure the selection of the best population of each species and the regeneration success of the *** this,inter-population variability also provides valuable information for enhancing our understanding of the mechanisms that regulate seed germination and how they might be related to seed provenance.

关键词： desert grass seed germination inter-population variability seed provenance seed dormancy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Population structure and regeneration patterns of tree species in climate-sensitive subalpine forests of Indian western Himalaya

引用

Journal of Forestry Research 2014年第2期25卷 343-349页

作者： Sanjay Gairola R. S. Rawal N. P. Todaria arvind bhatt School of Agricultural Earth and Environmental SciencesUniversity of KwaZulu-NatalWestville Campus G.B. Pant Institute of Himalayan Environment and Development Department of Forestry and Natural Resources H.N.B. Garhwal University School of Life Sciences University of KwaZulu-NatalWestville Campus

The population structure of tree species has been explored in order to elucidate regeneration potential of the subalpine forests of Indian western Himalaya. For this study, the subalpine forest area was divided into three strata, i.e., lower altitude （〈3000 m）; mid-altitude （3000-3200 m）; and high altitude （〉3200m）. Considering the major compositional attributes, an increase in altitude came with a significant decline in tree density and the total basal area for all the sites. However, no such clear trends were observed for recruits （i.e., seedlings and saplings）. Seedling density did not exhibit uniform patterns for sites and altitude strata. In general, overall seedling density was greater at the Pindari site compared to the Lata and Tungnath sites. By comparison, significant variation in seedling density along the altitude strata was recorded for the Tungnath and Pindari sites only. Likewise, sapling density patterns varied across the sites and altitude strata, and significant variation in sapling density along the altitude strata was recorded only for the Lata site. At the Pin- daft site, the continuous increase in sapling density along with increasing altitude was revealing. The Pindari forests of exhibited expanding population structure. In contrast, greater accumulation of individuals in the sapling class and sharp decline toward both higher tree classes and lower seedling classes was generally apparent for the Lata and Tungnath sites. This indicates that the replacement in tree size classes from sapling stage is not proportional and the population may decline in the long-term. Considerable variation in patterns of forest and dominant species popula- tion structure were evident across altitude strata. But in all cases irrespective of sites, we found growth at the high-altitude stratum, in the form of entire forests or dominant species. This trend deserves further investigation to explore its relevance under changing climate scenarios.

关键词： population structure regeneration subalpine forest altitude

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of aerial seed banks on germination response in three desert plant species

引用

Journal of Plant Ecology 2017年第6期10卷 994-1000页

作者： arvind bhatt Prakash Chandra Phondani Shyam S.Phartyal Andrea Santo David Gallacher Gulf Organization for Research and Development Qatar Science and Technology ParkP.O.Box 210162DohaQatar Institute of Botany University of Regensburg Universitätsstr 3193053 RegensburgGermany Centro Conservazione Biodiversità(CCB) Dipartimento di Scienze della Vita e dell’Ambiente(DISVA)Universitàdegli Studi di Cagliariviale S.Ignazio da Laconi 13CagliariItaly Department of Interdisciplinary Studies Zayed UniversityP.O.Box 19282Al RuwayyahDubaiUnited Arab Emirates Department of Forestry and Natural Resources H.N.B.Garhwal UniversitySrinagar-GarhwalIndia

Aims To determine if the germination response of desert plant species to a period of aerial storage in field conditions(*** seeds that remain attached to the parent plant)is comparable to seeds harvested at maturity and stored in ambient laboratory conditions,to better understand the role of aerial seed bank in the germina-tion ecology of desert plants,using one annual and two perennial *** Seeds of three desert plants(Anastatica hierochuntica,Blepharis ciliaris and Scrophularia deserti)that matured in June 2014,were collected from wild plants in June and November 2014,and ger-minated under two photoperiods(0,12 hours light)and three ther-moperiods(night/day temperatures of 15/25,20/30 and 25/35°c).Important Findings Seeds of *** and *** had significantly higher germination percentages when harvested and stored for five months,compared to being stored in the aerial seed *** percentages of these two species increased with decreasing temperature and in the presence of *** results indicate that these species use a com-bination of aerial and soil seed banks to maintain a percentage of viable seeds through favourable germination *** percentages of *** were high under all tested circum-stances,indicating that this species relies mainly on the aerial seed bank to maintain a percentage of viable seeds through favourable germination *** study shows that the population survival strategies of an aerial seed bank are *** results have practical implications for conservation and habitat restoration for these species,and also for their propagation since early collec-tion of mature fruits and ex situ storage will result in greater germi-nation percentages of some species.

关键词： Arabian Gulf desert climate light seed germination temperature

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Disturbance of plateau zokor-made mound stimulates plant community regeneration in the Qinghai-Tibetan Plateau, China

引用

Journal of Arid Land 2021年第10期13卷 1054-1070页

作者： XIANG Zeyu arvind bhatt TANG Zhongbin PENG Yansong WU Weifeng ZHANG Jiaxin WANG Jingxuan David GALLACHER ZHOU Saixia Lushan Botanical Garden Chinese Academy of SciencesJiujiang 332900China School of Life and Environmental Sciences The University of SydneyNarrabri NSW 2390Australia

Mounds constructed by plateau zokors,which is widely distributed in alpine meadows significantly modified plant community ***,the variations of plant community structure under the disturbance of plateau zokor-made mound are less ***,we investigated the responses of plant community on zokor-made mound of different years(1 a and 3-4 a),and compared with undisturbed sites(no mound)in an alpine meadow in the eastern Qinghai-Tibetan Plateau(QTP),*** richness,coverage and Simpson diversity index were all significantly reduced by the presence of zokor-made mound,but plant heights were significantly increased,particularly in grasses and *** perennial forage species showed an increased importance value and niche breadth,including Koeleria macrantha,Elymus nutans and Poa *** effect of zokor-made mound on niche overlap showed that more intense interspecific competition produced a greater utilization of environmental *** this interspecific niche overlap was strengthened as succession *** bare mound created by zokor burrowing activities provided a colonizing opportunity for non-dominant forage species,resulting in abundant plant species and plant diversity during the succession *** concluded that presence of zokor-made mound was conducive to regeneration and vitality of plant community in alpine meadows,thus improving their resilience to anthropogenic stress.

关键词： rodent mound zokor disturbance alpine meadow vegetation recovery niche

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

HvWRKY2 acts as an immunity suppressor and targets HvCEBiP to regulate powdery mildew resistance in barley

引用

The Crop Journal 2023年第1期11卷 99-107页

作者： Deshui Yu Renchun Fan Ling Zhang Pengya Xue Libing Liao Meizhen Hu Yanjun Cheng Jine Li Ting Qi Shaojuan Jing Qiuyun Wang arvind bhatt Qian-Hua Shen Lushan Botanical Garden Chinese Academy of ScienceJiujiang 332900JiangxiChina State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyChinese Academy of SciencesInnovation Academy for Seed DesignBeijing 100101China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China

Plants use a sophisticated immune system to perceive pathogen infection and activate immune responses in a tightly controlled *** barley,Hv WRKY2 acts as a repressor in barley disease resistance to the powdery mildew fungus,Blumeria graminis ***(Bgh).However,the molecular features of Hv WRKY2 in its DNA-binding and repressor functions,as well as its target genes,are *** show that the W-box binding of Hv WRKY2 requires an intact WRKY domain and an upstream sequence of~75 amino acids,and the Hv WRKY2 W-box binding activity is linked to its repressor function in disease *** immunoprecipitation(ChIP)-seq analysis identified HvCEBiP,a putative chitin receptor gene,as a target gene of Hv WRKY2 in overexpressing transgenic barley ***-qPCR and Electrophoretic Mobility Shift Assay(EMSA)verified the direct binding of Hv WRKY2 to a W-boxcontaining sequence in the HvCEBiP *** CEBiP positively regulates resistance against Bgh in *** findings suggest that Hv WRKY2 represses barley basal immunity by directly targeting pathogen-associated molecular pattern(PAMP)recognition receptor genes,suggesting that Hv CEBiP and likely chitin signaling function in barley PAMP-triggered immune responses to Bgh infection.

关键词： HvWRKY2 Basal immunity Chromatin immunoprecipitation(ChIP) HvCEBiP

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：