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Effects on antioxidant enzyme activities and osmolytes in Halocnemum strobilaceum under salt stress

Research in Cold and Arid Regions 2016年第1期8卷 65-71页

作者： TianPeng Gao Rui Guo XiangWen Fang ZhiGang Zhao GuoHua Chang YinQuan Chen Qing Zhang Centre of Urban Ecology and Environmental Bioteehnology Lanzhou City UniversityLanzhouGansu 730070China State Key Laboratory of Grassland Agro-ecosystems Institute of Arid AgroecologySchool of Life SciencesLanzhou UniversityLanzhouGansu 730000China School of Chemistry and Environment Sciences Lanzhou City UniversityLanzhouGansu 730070China

The seedlings of Halocnermum strobilaceum were cultivated in 0.5% hoagland nutrient solution containing 0.0%, 0.9%, 2.7% and 5.4% of NaC1 as well as composite salt （Na^＋, Ca^2＋, K^＋, Si^4＋） for 20 days; all the contents are in weight ratio. succulent level, inorganic ions （Na^＋, K^＋）, organics such as betaine, proline, malondialdehyde, and antioxidant enzyme activities including superoxide dismutase （SOD）, catalase （CAT）, peroxidase （POD）, betaine aldehyde dehydrogenase （BADH） were measured to reveal its salt tolerance mechanism. When the composite salt concentration reaches 5.4%, SOD activity level, and MDA content is five times the control group; when it reaches 2.7%, the succulent level of seedlings, and the content ofK＋ in roots is nearly two times the NaCl treatment; the dry weight is more than three times the control group; with the NaCl treatment, MDA is three times the contrast; when the salt concentration is 2.7%, POD reaches the maximum. Results indicate that Si^4＋, K^＋, and Ca^20 from composite salt in the roots of H. strobilaceum improved the water-holding capacity. The activities of antioxidant enzyme were raised by the accumulation ofproline and betaine, which increased the salt tolerance. The absorption of K^＋ promoted the high ratio of K^＋/Na^＋ and alleviated the damage of cell membranes of H. strobilaceum, which is associated with osmotic contents such as betaine and proline.

关键词： Halocnermum strobilaceum (Pall.) salt stress succulent antioxidant enzyme activities

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Ecology of Indigenous Plants in Abandoned Agricultural Areas in Tabuk Region, Saudi Arabia

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Open Journal of Ecology 2022年第2期12卷 162-174页

作者： Nadi Awad Al-Harbi Biology Department University College of Tayma Tabuk University Tabuk Saudi Arabia

Due to drought, low soil fertility, little rain fall, elevated levels of evapotranspiration, salinization of the soil and a lack of ground water, the problem of desertion of agricultural areas has developed in KSA in recent years (e.g. Tabuk region). In the Saudi Arabia, agricultural land abandonment’s negative impact on the composition of perennial vegetation, soil quality, and the structure of population was investigated. In the several abandoned fields of the research region, eleven species of perennial plants pertaining to nine families, eleven genera were found. Following the use of the ordination of detrended correspondence analysis (DCA), four plant communities were found. Zygophyllum hamiense, Prosopis farcta, Seidlitzia rosmarinus, Traganum nudatum. The indicators were Pulicaria undulate, Calligonum comosum. Populations of Calligonum comosum and Zygophyllum hamiense were found to be either negatively skewed or inversely J-shaped, indicating fast-growing populations with strong reproductive potential, according to demographic research. Traganum nudatum, Prosopis farcta and S. Rosmarinus, on the other hand, have a nearly symmetrical size-frequency distribution (like a bell in shape). The current research highlights the importance of managing deserted agricultural fields in order to restore and improve range lands having adapted native plants to regional conditions like little water demand.

关键词： Halophytes succulent Ecology Deserted Lands

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Impact of the Future Changing Climate on the Southern Africa Biomes, and the Importance of Geology

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Journal of Geoscience and Environment Protection 2017年第7期5卷 1-9页

作者： Danni Guo Philip G. Desmet Leslie W. Powrie South African National Biodiversity Institute Kirstenbosch Research Center Cape Town Republic of South Africa Department of Zoology Nelson Mandela Metropolitan University Port Elizabeth Republic of South Africa

The Southern African biomes are complex biotic communities, with its distinctive plant and animal species, and are maintained under the suitable climatic conditions of the region. It includes the Fynbos Biome and the succulent Karoo Biome, which forms the smallest of the world’s six Floristic Kingdoms, and they are of conservation concern. The other six biomes are Albany Thicket, Desert, Grassland, Indian Ocean Coastal belt, Nama-Karoo, Savanna. The biomes are not only threatened by agricultural expansion, overgrazing, and mining;but also by future climate changes and droughts. This study investigates the how to best model the possible vulnerable biome areas, under future climate changes, and how Southern African geology plays a huge role in the restriction of the biome shifts. It provides evidence regarding the importance of the study to understanding the climate change impacts and the geological variables on the Southern African biomes, in terms of possible future biome habitat loss.

关键词： Climate Change Biomes Geology Southern Africa Albany Thicket Desert Fynbos Grassland Indian Ocean Coastal Belt Nama-Karoo Savanna succulent Karoo

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Applicable Garden Ground Cover Plants in Arid Valleys of Ganzi Tibetan Area

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Journal of Landscape Research 2020年第2期12卷 95-98页

作者： XIE Xueqiang Agronomy Department of Sichuan Minzu College KangdingSichuan 626001China

The native and introduced ground cover plants were screened by field survey,cultivation test and configuration effect evaluation in arid valleys of Ganzi Tibetan area.A total of 205 species belonging to 140 genera,67 families were selected as applicable *** them,there were 53 species of evergreen shrubs,36 species of deciduous shrubs,17 species of woody vines,99 species of herbaceous plants;27 species of color-leafed plants,8 species of succulent *** 79 species were recommended as the best ground cover *** plants in Ganzi Tibetan area were increased to 5,362 species,1147 genera,244 families through screening.

关键词： Ganzi Tibetan area Arid valley Higher plants Garden plants Ground cover plants Colorleafed plants succulent plants Resource plants

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