scholarly journals Seasonal fluctuations and temperature dependence in photosynthetic parameters and stomatal conductance at the leaf scale of Populus euphratica Oliv.

2011 ◽  
Vol 31 (2) ◽  
pp. 178-195 ◽  
Author(s):  
G.-F. Zhu ◽  
X. Li ◽  
Y.-H. Su ◽  
L. Lu ◽  
C.-L. Huang
Keyword(s):  
Stomatal Conductance ◽  
Temperature Dependence ◽  
Populus Euphratica ◽  
Photosynthetic Parameters ◽  
Seasonal Fluctuations ◽  
Populus Euphratica Oliv

scholarly journals Parameterization of a coupled CO<sub>2</sub> and H<sub>2</sub>O gas exchange model at the leaf scale of <i>Populus euphratica</i>

2010 ◽  
Vol 14 (3) ◽  
pp. 419-431 ◽  
Author(s):  
G. F. Zhu ◽  
X. Li ◽  
Y. H. Su ◽  
C. L. Huang
Keyword(s):  
Stomatal Conductance ◽  
Gas Exchange ◽  
Electron Transport Rate ◽  
Populus Euphratica ◽  
Coupled Model ◽  
Net Photosynthesis ◽  
Combined Model ◽  
Validation Data ◽  
Bisphosphate Carboxylase ◽  
Diurnal Patterns

Abstract. The following two models were combined to simultaneously predict CO2 and H2O gas exchange at the leaf scale of Populus euphratica: a Farquhar et al. type biochemical sub-model of photosynthesis (Farquhar et al., 1980) and a Ball et al. type stomatal conductance sub-model (Ball et al., 1987). The photosynthesis parameters [including maximum carboxylation rate allowed by ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) carboxylation rate (Vcmax), potential light-saturated electron transport rate (Jmax), triose phosphate utilization (TPU) and day respiration (Rd)] were determined by using the genetic algorithm (GA) method based on A/Ci data. Values of Vcmax and Jmax standardized at 25 °C were 75.09±1.36 (mean ± standard error), 117.27±2.47, respectively. The stomatal conductance sub-model was calibrated independently. Prediction of net photosynthesis by the coupled model agreed well with the validation data, but the model tended to underestimate transpiration rates. Overall, the combined model generally captured the diurnal patterns of CO2 and H2O exchange resulting from variation in temperature and irradiation.

Changes of Photosynthetic Parameters in Jatropha curcas L. Leaves under Cobalt Stress

2019 ◽  
Vol 5 (04) ◽  
pp. 278-283
Author(s):  
Kamal Kant Patra ◽  
Deepti Oberoi ◽  
Rajat Kumar Joshi ◽  
Raghunath Prasad ◽  
Dharam Deo Pandey
Keyword(s):  
Stomatal Conductance ◽  
Chlorophyll A ◽  
Photosynthetic Pigments ◽  
Transpiration Rate ◽  
Jatropha Curcas ◽  
Photosynthetic Parameters ◽  
Cobalt Toxicity ◽  
Use Efficiency ◽  
Survival Potential ◽  
Increasing Trends

In the present investigation, changes of photosynthetic parameters including net photosynthetic rate (PN); stomatal conductance (gs), transpiration rate (E), and water-use efficiency (WUE) were studied in Jatropha (Jatropha curcas cv. DARL-2) under different concentrations of cobalt (Co) (0, 100, 200, 400, 600, 800, and 1000 mg kg-1) toxicity. The PN, gs, and E trends were shown in increasing trends up to 200 mg kg-1 Co in comparison to controlled plants. However, trends of WUE and photosynthetic pigments [chlorophyll a, b, (a+b), and carotenoids] were found in decreasing order in all concentrations of cobalt stress as compared to controlled plants. The PN value was ~1.33, and ~2.44 fold higher in 100 and 200 mg kg-1 but decreased ~2.61, ~6.86, and ~15.40 fold in 400, 600, and 800 mg kg-1 cobalt treatment, respectively. Similarly, the gs rate was ~1.33, and ~1.69 fold higher in 100 and 200 mg kg-1 but decreased ~1.89, ~3.38, and ~8.71 fold in 400, 600, and 800 mg kg-1 cobalt treatment. The E was significantly ~1.44, ~2.74, and ~1.35 fold higher in 100, 200, and 400 mg kg-1 decreased ~1.03 and ~1.43 fold in 600 and 800 mg kg-1. The WUE was ~0.93, ~0.89, ~3.50, ~6.51, and ~10.76 fold decreased in all Co treated plants. In addition, the content of photosynthetic pigments [chlorophyll a, b, (a+b), and carotenoids] was varying in all Co treated plants. All studied plants were survived morphologically up to 800 mg kg-1 but seedlings were not survived due to severe cobalt toxicity stress in 1000 mg kg-1. Among studied plants, Jatropha seedlings showed the best survival potential under 200 mg kg-1 Co stress.

scholarly journals Retraction Note to: An assessment of transgenomics as a tool for gene discovery in Populus euphratica Oliv.

2018 ◽  
Vol 98 (6) ◽  
pp. 579-579
Author(s):  
Jing Zhou ◽  
Xin Liu ◽  
Shu-Tang Zhao ◽  
Jian-Jun Hu ◽  
Jie-Wei Zhang ◽  
...  
Keyword(s):  
Gene Discovery ◽  
Populus Euphratica ◽  
Populus Euphratica Oliv

scholarly journals Genome-wide analysis of RNAs associated with Populus euphratica Oliv. heterophyll morphogenesis

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Shao-Wei Qin ◽  
Ren-Jun Jiang ◽  
Na Zhang ◽  
Zhan-Wen Liu ◽  
Cai-Lin Li ◽  
...  
Keyword(s):  
Populus Euphratica ◽  
Genome Wide Analysis ◽  
Genome Wide ◽  
Populus Euphratica Oliv

scholarly journals Phenotyping of rice in salt stress environment using high-throughput infrared imaging

2014 ◽  
Vol 73 (1) ◽  
pp. 312-321 ◽  
Author(s):  
Zamin S. Siddiqui ◽  
Jung-Il Cho ◽  
Sung-Han Park ◽  
Taek-Ryoun Kwon ◽  
Gang-Seob Lee ◽  
...  
Keyword(s):  
Salt Stress ◽  
Stomatal Conductance ◽  
Water Content ◽  
Relative Water Content ◽  
Infrared Imaging ◽  
Oryza Sativa L ◽  
Photosynthetic Parameters ◽  
Relative Water ◽  
Stress Environment ◽  
And Performance

Abstract Phenotyping of rice (Oryza sativa L. cv. Donggin) in salt stress environment using infrared imaging was conducted. Results were correlated with the most frequently used physiological parameters such as stomatal conductance, relative water content and photosynthetic parameters. It was observed that stomatal conductance (R2 = -0.618) and relative water content (R2 = -0.852) were significantly negatively correlated with average plant temperature (thermal images), while dark-adapted quantum yield (Fv/Fm, R2 = -0.325) and performance index (R2 = -0.315) were not consistent with plant temperature. Advantages of infrared thermography and utilization of this technology for the selection of stress tolerance physiotypes are discussed in detail.

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