Effect of Sodium Chloride on Growth, Gas Exchange, Protective Enzyme of Periploca Sepium Bunge

2012 ◽  
Vol 500 ◽  
pp. 130-135
Author(s):  
Jing Kuan Sun ◽  
Zhao Hua Lu ◽  
Tian Li ◽  
Jia Yi Tian
Keyword(s):  
Yellow River ◽  
Growth Parameters ◽  
Yellow River Delta ◽  
Nacl Stress ◽  
Low Salinity ◽  
Protective Enzyme ◽  
Salinity Levels ◽  
Use Efficiency ◽  
The Common ◽  
Periploca Sepium

Periploca sepium Bunge. was tested for salinity tolerance in pot experiments using three levels of salinity, 50, 100, and 200mmol/L.It was observed that the plant growth parameters and net photosynthetic rate (Pn), stomatal conductance (Gs) were enhanced under low salinity levels (50mm/L NaCl.),which reduced strongly with increasing salinity levels. Under 100mmol/L NaCl and 200mmol/L NaCl stress, the decline of Pn was mainly caused by non-stomatal factors.The water use efficiency (WUE), apparent light use efficiency (LUE) , apparent CO2 use efficiency (CUE) were enhanced under low salinity levels (50mm/L NaCl.), the maximum WUE was observed at 100mmol/L NaCl, the minimum WUE was observed at 200mmol/L NaCl, the LUE, CUE were reduced repectively by 52%,47% at 200mmol/L NaCl compared to control.Activities of the antioxidive enzymes superoxide dismutase (SOD), peroxidase (POD),and catalase (CAT) were enhanced by salts treatment (50mm/L NaCl.), but CAT activity decreased under 200 mmol/L NaCl salt stress. Malondialdehyde (MDA) concentration was non-significant versus the control under low salinity levels (50mm/L NaCl.),the largest concentration exposing to 200 mmol/L NaCl. These results suggest a possible use of Periploca sepium Bunge in Yellow River Delta regions,where salinity is often the common major abiotic stress for plants.

scholarly journals Influence of salt stress on ecophysiological parameters of Periploca sepium bunge

2011 ◽  
Vol 57 (No. 4) ◽  
pp. 139-144 ◽  
Author(s):  
J.K. Sun ◽  
T. Li ◽  
J.B. Xia ◽  
J.Y. Tian ◽  
Z.H. Lu ◽  
...  
Keyword(s):  
Salt Stress ◽  
Yellow River ◽  
Growth Parameters ◽  
Nacl Stress ◽  
Salinity Treatment ◽  
Low Salinity ◽  
Maximum Value ◽  
Salinity Levels ◽  
Use Efficiency ◽  
Periploca Sepium

An experiment was carried out to investigate the effect of salt stress on Periploca sepium Bunge seedlings using three levels of salinity, 50 mmol/L, 100 mmol/L, and 200 mmol/L sodium chloride (NaCl) solution. The results showed that growth parameters and net photosynthetic rate (P<sub>n</sub>), stomatal conductance (G<sub>s</sub>) of Periploca sepium Bunge were enhanced under low salinity levels (50 mmol/L NaCl), which reduced strongly with increasing salinity levels. Under 100 mmol/L NaCl and 200 mmol/L NaCl stress, the decline of P<sub>n</sub> was mainly caused by non-stomatal factors. The water use efficiency (WUE), apparent light use efficiency (LUE), carboxylation efficiency (CUE) were enhanced under low salinity levels (50 mmol/L NaCl), the maximum value of WUE was observed at 100 mmol/L NaCl, the minimum value of WUE was observed at 200 mmol/L NaCl, the LUE, CUE were reduced by 52% and 47%, at 200 mmol/L NaCl, respectively, compared to control. Activities of the antioxidative enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were enhanced by low salinity treatment (50 mmol/L NaCl), but CAT activity decreased at 200 mmol/L NaCl stress. Malondialdehyde (MDA) was non-significant compared to the control under low salinity levels (50 mmol/L NaCl), the maximum value was observed at 200 mmol/L NaCl. These results suggest a possibility to improve saline soil utilization of Periploca sepium Bunge in Yellow River Delta region.

scholarly journals Influence of salinity levels on vegetative development of landrace dwarf common bean (Phaseolus vulgaris L.) Genotypes

2018 ◽  
Vol 7 (9) ◽  
pp. 167-179
Author(s):  
Kamile Ulukapi ◽  
Köksal Aydinsakir
Keyword(s):  
Common Bean ◽  
Growth Parameters ◽  
Dry Weight ◽  
Morphological Characters ◽  
Western Mediterranean ◽  
Vegetative Development ◽  
Low Salinity ◽  
Salt Level ◽  
Salinity Levels ◽  
The Common

In this study, plant growth parameters of 16 landrace dwarf common bean genotypes collected from Western Mediterranean region of Turkey at different salinity levels were investigated. The salt concentrations were applied 0.5 (regular irrigation water), 2, 4 and 6 dSm-1. The study continued until the first flowering was observed in the plants. The results of analysis of the variance revealed significant variations among different salinity levels, genotypes and interaction effects of salinity levels × genotypes for morphological characters. According to statistical analysis results, there was no correlation between stem diameter and other morphological characters. It was determined that there was a statistically significant positive strong correlation between plant height and plant dry weight (r=0.703). There was a moderately statistically significant positive correlation between all other characters. The increased salinity level negatively affected the vegetative growth of the common bean genotypes. However, low doses of salt have promoted development in some genotypes (AGB10, AGUN25, BY4, BY24, IYOZ10). However, a slight increase in salt level caused a sudden drop in development. These genotypes are thought to be suitable for soils with low salinity. The genotypes gave different responses to salt stress and ISGA1 and ISGA10 genotypes gave the best results. Besides them, prominent genotypes were detected as AGUN6, BKARA2, AGB10 and IYOZ10.

scholarly journals Effect of Salinity on Growth and Some Photosynthetic Pigments of Improved Population in Puccinellia ciliata (Poaceae)

2020 ◽  
pp. 64-70 ◽  
Author(s):  
Ilkay Yavas ◽  
Yelda Emek ◽  
Aydin Unay
Keyword(s):  
Chlorophyll A ◽  
Seedling Growth ◽  
Photosynthetic Pigments ◽  
Recurrent Selection ◽  
Growth Parameters ◽  
Maximum Length ◽  
Low Salinity ◽  
Randomized Design ◽  
Salinity Levels ◽  
Β Carotene

Puccinellia (Puccinellia ciliata Bor.) fairly resistant to salinity and used as forage for livestock in China, Australia, and Turkey. In this study, our objective was to determine the effects of salinity on growth and various photosynthetic pigments of an improved population of Puccinellia via recurrent selection. To accomplish this, effects of salinity on seedlings growth of homogenous Puccinellia was examined, one week after emerging of radicle from seeds. Seeds were germinated on Murashige and Skoog (MS) medium with 6% agar. Seedling growth was studied under different levels of NaCl salinity (0, 10, 20, 30, 40 μS/cm). Salinity applications were carried out for 6 weeks. Cultures were maintained in growth chambers at 24±2ºC and 16/8 light/dark conditions. Germination was scored during 2 weeks after culture initiation. The experiment was performed in a completely randomized design with three replicates. Plant growth parameters such as the number of radicle and tillers, maximum radicle and shoot length, plants fresh and dry weights were investigated. Photosynthetic pigments such as total chlorophyll, chlorophyll a, b, chlorophyll a/b ratio, total carotenoid, β- carotene, lutein and neoxanthin were examined. The maximum values for tiller number per plant, the maximum length of shoot and chlorophyll b were found in the 20 µs/cm, while the maximum length of the radicle was recorded at 10 µs/cm NaCl treatment. It was concluded that low salinity levels (10-20 μS/cm) increased seedling growth, while high salinity levels (30 and 40 μS/cm) inhibited the growth significantly. These results indicate that P. ciliata is a promising salt-tolerant and can be grown productively under low to moderate saline conditions between 10-20 µs/cm.

Properties of saline-alkaline soil under different land use types in Yellow River Delta

2009 ◽  
Vol 17 (6) ◽  
pp. 1132-1136
Author(s):  
Qing-Mei LI ◽  
Long-Yu HOU ◽  
Yan LIU ◽  
Feng-Yun MA
Keyword(s):  
Land Use ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Alkaline Soil ◽  
Land Use Types

Effects of reclamation on net ecosystem CO2 exchange in wetland in the Yellow River Delta, China

2013 ◽  
Vol 37 (6) ◽  
pp. 503-516 ◽  
Author(s):  
Li-Qiong YANG ◽  
Guang-Xuan HAN ◽  
Jun-Bao YU ◽  
Li-Xin WU ◽  
Min ZHU ◽  
...  
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Co2 Exchange ◽  
River Delta ◽  
The Yellow River ◽  
Net Ecosystem Co2 Exchange ◽  
The Yellow River Delta

scholarly journals Impacts of Consolidation Time on the Critical Hydraulic Gradient of Newly Deposited Silty Seabed in the Yellow River Delta

2021 ◽  
Vol 9 (3) ◽  
pp. 270
Author(s):  
Meiyun Tang ◽  
Yonggang Jia ◽  
Shaotong Zhang ◽  
Chenxi Wang ◽  
Hanlu Liu
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Hydraulic Gradient ◽  
River Delta ◽  
Theoretical Formula ◽  
The Yellow River ◽  
The Yellow River Delta ◽  
Critical Hydraulic Gradient ◽  
Seepage Flows ◽  
The Yrd

The silty seabed in the Yellow River Delta (YRD) is exposed to deposition, liquefaction, and reconsolidation repeatedly, during which seepage flows are crucial to the seabed strength. In extreme cases, seepage flows could cause seepage failure (SF) in the seabed, endangering the offshore structures. A critical condition exists for the occurrence of SF, i.e., the critical hydraulic gradient (icr). Compared with cohesionless sands, the icr of cohesive sediments is more complex, and no universal evaluation theory is available yet. The present work first improved a self-designed annular flume to avoid SF along the sidewall, then simulated the SF process of the seabed with different consolidation times in order to explore the icr of newly deposited silty seabed in the YRD. It is found that the theoretical formula for icr of cohesionless soil grossly underestimated the icr of cohesive soil. The icr range of silty seabed in the YRD was 8–16, which was significantly affected by the cohesion and was inversely proportional to the seabed fluidization degree. SF could “pump” the sediments vertically from the interior of the seabed with a contribution to sediment resuspension of up to 93.2–96.8%. The higher the consolidation degree, the smaller the contribution will be.

scholarly journals Nitrate leaching and NH3 volatilization during soil reclamation in the Yellow River Delta, China

2021 ◽  
pp. 117330
Author(s):  
Wei Zhu ◽  
Jingsong Yang ◽  
Rongjiang Yao ◽  
Xiangping Wang ◽  
Wenping Xie ◽  
...  
Keyword(s):  
Nitrate Leaching ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Soil Reclamation ◽  
The Yellow River ◽  
Nh3 Volatilization ◽  
The Yellow River Delta
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