The seasonal effects of water stress on Ammopiptanthus mongolicus in a desert environment

Xu, Shuang; An, Lizhe; Feng, Hongru; Wang, Xunling; Li, Xinrong

doi:10.1006/jare.2001.0949

Cited by 34 publications

(24 citation statements)

References 22 publications

(19 reference statements)

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“…In Australia, Naidu et al (2000) analyzed 125 Melaleuca species in different habitats and found proline accumulation in all of the species. Many studies have shown that the accumulation of proline could protect plant macromolecules (Delauney and Verma, 1993;Xiong and Zhu, 2002;Xu et al, 2002) and increase plant survival in stressful situations (Ain-Lhout et al, 2001;Chang and Lee, 1999;Naidu et al, 2000), and thus may play an important role in the ecological distribution of species.…”

Section: Variations In Lwc and Proline Content Of Major Plant Speciesmentioning

confidence: 98%

Isotopic carbon composition and related characters of dominant species along an environmental gradient in Inner Mongolia, China

Chen¹,

Bai²,

Lin³

et al. 2007

Journal of Arid Environments

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Section: Variations In Lwc and Proline Content Of Major Plant Speciesmentioning

confidence: 98%

Isotopic carbon composition and related characters of dominant species along an environmental gradient in Inner Mongolia, China

Chen¹,

Bai²,

Lin³

et al. 2007

Journal of Arid Environments

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“…However, this trend might also indicate that there was an N deficit in P. euphratica and T. ramosissima. Foliar P and K significantly increased the osmotic adjustment capacity and cell membrane stability of plant (Gnansiri and Hirohumi 1990), and under drought conditions, P and K played a primary control role in the accumulation of osmotic components (Xu et al 2002;Wang et al 2004). In this study, the values of P and K concentration in P. euphratica were generally higher than those of T. ramosissima during the growing season, and the mean foliar P and K concentrations in P. euphratica were 1.36 and 1.61 times those of T. ramosissima, respectively (Fig.…”

Section: Seasonal Variation In Foliar Nutrient Concentrationmentioning

confidence: 99%

Research on the water use efficiency and foliar nutrient status of Populus euphratica and Tamarix ramosissima in the extreme arid region of China

Cao

Feng

et al. 2010

Environ Earth Sci

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Seasonal variations in foliar stable carbon composition (d 13 C) and nitrogen (N), phosphorus (P) and potassium (K) concentrations of Populus euphratica Olivier and Tamarix ramosissima Ledeb, as well as correlations between foliar d 13 C values and N, P and K concentrations were studied in the Ejina oasis in the lower reaches of the Heihe River, northwestern China. Foliar d 13 C values, and P and K concentrations significantly differed between species. Foliar d 13 C signatures in T. ramosissima were significantly more enriched than those in P. euphratica, but P and K concentrations of P. euphratica were higher. The seasonal variations and patterns of these were similar. The total foliar d 13 C values and N, P and K concentrations in both P. euphratica and T. ramosissima showed a descending trend. There were significantly positive correlations between foliar d 13 C values and N and P concentration of both P. euphratica and T. ramosissima. For the relationship between foliar d 13 C and K concentration, there appeared oppositely positive and negative correlations in P. euphratica and T. ramosissima, respectively, but they were not significant. The simple positive correlations of d 13 C-P% and d 13 C-N% suggested that N and P in P. euphratica and T. ramosissima behave in a similar manner. This study also showed that there were nutrient deficiencies; N and P nutriments were the colimiting factors in P. euphratica, while it was P nutriment in T. ramosissima.

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“…Ammopiptanthus mongolicus, the only evergreen broadleaf shrub endemic to the northwest desert of China, has been proposed as a valuable species for research on plant abiotic stress tolerance (Liu et al 2007(Liu et al , 2010Xu et al 2002). The absences of genetic and genomic tools for this species limit its current utility.…”

Section: Introductionmentioning

confidence: 99%

Reference gene selection for qPCR in Ammopiptanthus mongolicus under abiotic stresses and expression analysis of seven ROS-scavenging enzyme genes

et al. 2012

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Ammopiptanthus mongolicus, the only evergreen broadleaf shrub endemic to the northwest desert of China, is a valuable species for plant abiotic stress research. No report has so far described the selection of reference genes to get stringent normalization for qPCR in A. mongolicus. This work identified reliable reference genes for normalization of qPCR data in A. mongolicus under abiotic stresses from 14 reference gene candidates (UBQ, Tub1, Tub2, Abc1, Ubc1, Ubc2, Ubc4, Ubc5, eIF1, eIF2, eIF3, eIF4, EF1, EF2), and used the most suitable combination of reference genes to normalize the expression profiles of seven ROS-scavenging enzyme genes (AmSOD, AmAPX, AmGPX, AmCAT, AmGLR, AmPrx, and AmTrx). We set a series of 22 experimental samples covering the control and different time points under cold, dry, salt, and heat stresses. According to geNorm and NormFinder, the combination of eIF1 and eIF3 was best for accurate normalization across all the treatments, confirmed by normalizing qPCR data with AmHsp90. In contrast, these data show that Tub1, Abc1, and EF1 are not suitable reference gene candidates. After being normalized against eIF1 and eIF3, the seven ROS-scavenging enzyme genes exhibited differentially up- or down-regulated expression patterns. AmSOD and AmGPX were up-regulated by all four treatments, indicating that they may participate in an anti-oxidative mechanism under abiotic stresses in A. mongolicus. AmCAT exhibited a much higher expression level than AmAPX, AmPrx, and AmGPX, suggesting a principle role in detoxifying excessive H₂O₂. AmSOD, AmGPX and AmAPX showing the most abundant transcripts under heat, AmCAT and AmGLR under drought, and AmPrx under salt, were observed. Expression patterns of the seven ROS-scavenging enzyme genes suggest different antioxidant protection roles of these genes under abiotic stresses. These results are valuable for future research on gene expression and abiotic stress tolerance in A. mongolicus.

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The seasonal effects of water stress on Ammopiptanthus mongolicus in a desert environment

Cited by 34 publications

References 22 publications

Isotopic carbon composition and related characters of dominant species along an environmental gradient in Inner Mongolia, China

Isotopic carbon composition and related characters of dominant species along an environmental gradient in Inner Mongolia, China

Research on the water use efficiency and foliar nutrient status of Populus euphratica and Tamarix ramosissima in the extreme arid region of China

Reference gene selection for qPCR in Ammopiptanthus mongolicus under abiotic stresses and expression analysis of seven ROS-scavenging enzyme genes

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