Topic
Haloxylon
About: Haloxylon is a research topic. Over the lifetime, 229 publications have been published within this topic receiving 2256 citations. The topic is also known as: Saxaul.
Papers published on a yearly basis
Papers
TL;DR: This integrated study investigated the response, acclimation and adaptation of two desert shrubs, with different water-use strategies, to variations in water conditions, and predicted that H. ammodendron is predicted to succeed in interspecific competition in a future, moister habitat.
Abstract: As part of global climate change, variation in precipitation in arid ecosystems is leading to plant adaptation in water-use strategies; significant interspecific differences in response will change the plant composition of desert communities. This integrated study on the ecophysiological and individual morphological scale investigated the response, acclimation and adaptation of two desert shrubs, with different water-use strategies, to variations in water conditions. The experiments were carried out on two native dominant desert shrubs, Tamarix ramosissima and Haloxylon ammodendron, under three precipitation treatments (natural, double and no precipitation, respectively), in their original habitats on the southern periphery of Gurbantonggut Desert, Central Asia, during the growing season in 2005. Changes in photosynthesis, transpiration, leaf water potential, water-use efficiency, above-ground biomass accumulation and root distribution of the two species were examined and compared under the contrasting precipitation treatments. There were significant interspecific differences in water-use strategy and maintenance of photosynthesis under variation in precipitation. For the phreatophyte T. ramosissima, physiological activity and biomass accumulation rely on the stable groundwater, which shields it from fluctuation in the water status of the upper soil layers caused by precipitation. For the non-phreatophyte H. ammodendron, efficient morphological adjustment, combined with strong stomatal control, contributes to its acclimation to variation in precipitation. On account of its positive responses to increased precipitation, H. ammodendron is predicted to succeed in interspecific competition in a future, moister habitat.
200 citations
TL;DR: In this article, the authors investigated the dynamics of water usage of the two species and their responses to the soil water fluctuations resulting from summer precipitation in the Gurbantonggut Desert, China.
Abstract: Haloxylon ammodendron and Haloxylon persicum are the dominant species in the Gurbantonggut Desert, China, with the former grows at inter-dune lowland and the later grows at the sand dune. This study aims to investigate the dynamics of water usage of the two species and their responses to the soil water fluctuations resulting from summer precipitation. Oxygen isotope ratios (δ
18O) were measured for xylem water, soil water in different soil layers (0–300 cm), precipitation water and groundwater. Four potential water sources were identified: shallow (0–40 cm), middle (40–100 cm) and deep soil water (100–300 cm), as well as groundwater. The water sources used by the two species were calculated using the IsoSource model. When the upper soil water was abundant in early spring, H. ammodendron mainly used shallow soil water while H. persicum mainly used middle soil water; when the upper soil water was depleted in summer, H. ammodendron mainly used groundwater while H. persicum mainly used deep soil water. Both species were conservative in using shallow soil water following the relatively large summer precipitations. The two Haloxylon species had distinct water use patterns during the growing season, which reflects their adaptations to their specific habitats in this water-limited desert environment. Large precipitations in dry summer hardly altered their water use patterns, which mean that these species are rather conservative in water use strategy.
162 citations
TL;DR: In this article, the effects of increasing salt concentrations 0, 180, 360 mol im3 sodium chloride (NaCl), on growth, succulence, mineral composition, and glycinebetaine content in Haloxylon recurvum was investigated.
Abstract: Effects of increasing salt concentrations 0, 180, 360 mol im3 sodium chloride (NaCl), on growth, succulence, mineral composition, and glycinebetaine content in Haloxylon recurvum was investigated. Fresh and dry weight of plants increased with an increase in salinity. Succulence of shoots increased at low salinity and decreased at high salinity. Root and shoot Ca+, Mg+, and K+content decreased with increasing salinity while both Na+ and Cl‐ content increased, reaching 4,900 and 5,300 mmol kg‐1 dry weight, respectively. Glycinebetaine (mol m‐3 tissue water) significantly increased in shoots at 360 mol m‐3 NaCl, but did not differ significantly in roots treated with from 0 to 360 mol m‐3 NaCl. Haloxylon recurvum is a highly salt tolerant stem succulent plant which accumulate a high quantity of salt, which makes it a good candidate to use for phytoremediation in highly saline areas of the sub‐tropics.
159 citations
TL;DR: In this article, the effect of salinity and temperature on the germination of seeds was investigated and the results indicated that exposure to high concentration of NaCl permanently inhibited germination.
147 citations
TL;DR: Vladimir I. Pyankov, Clanton C. Black Jr., Elena G. Artyusheva, Elena V. Voznesenskaya, Maurice S.B. Ku and Gerald E. Edwards .
Abstract: Vladimir I. Pyankov, Clanton C. Black Jr., Elena G. Artyusheva, Elena V. Voznesenskaya, Maurice S.B. Ku and Gerald E. Edwards 1 Department of Plant Physiology, Urals State University, Lenin Avenue 51, 620083 Ekaterinburg, Russia 2 Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, U.S.A. 3 Morphology and Anatomy Department, Komarov Botanical Institute RAS, Prof. Popov Street 2, 197376 St. Petersburg, Russia 4 Botany Department, Washington State University, Pullman, WA 99164-4238, U.S.A.
131 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 5 |
| 2020 | 1 |
| 2019 | 15 |
| 2018 | 7 |
| 2017 | 5 |
| 2016 | 9 |