A salinity-tolerant japonica cultivar has Na+exclusion mechanism at leaf sheaths through the function of a Na+transporter OsHKT1;4 under salinity stress

2018 ◽  
Vol 204 (3) ◽  
pp. 274-284 ◽  
Author(s):  
T. Wangsawang ◽  
S. Chuamnakthong ◽  
E. Kohnishi ◽  
P. Sripichitt ◽  
T. Sreewongchai ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Japonica Cultivar ◽  
Exclusion Mechanism

scholarly journals Physiological and growth responses of sour cherry (Prunus cerasus L.) plants subjected to short-term salinity stress

2018 ◽  
Vol 77 (2) ◽  
pp. 197-202
Author(s):  
Ioannis E. Papadakis ◽  
Georgia Veneti ◽  
Christos Chatzissavvidis ◽  
Ioannis Therios
Keyword(s):  
Salinity Stress ◽  
Chlorophyll Concentration ◽  
Sour Cherry ◽  
Prunus Cerasus ◽  
Growth Responses ◽  
Short Term ◽  
Hydroponic Experiment ◽  
Leaf Chlorophyll ◽  
Short Term Exposure ◽  
Exclusion Mechanism

Abstract The gradual response of CAB-6P sour cherry (Prunus cerasus L.) plants to NaCl-induced salinity stress (60 mM NaCl) was investigated in a short-term hydroponic experiment, based on parameters relating to the growth, water relations, chlorophyll and mineral nutrition. The results showed that CAB-6P plants are very sensitive to salinity stress because their growth and leaf chlorophyll concentration were both affected negatively from the 3rd and 5th day, respectively, after incurring salinity stress. Since root growth was suppressed more severely than shoot growth, the shoot to root ratio was significantly increased under saline conditions. The concentrations of Na in leaves and stem of NaCl-treated plants were much lower than those measured in roots, suggesting Na exclusion mechanism from the shoot. The opposite trend was observed for Cl, indicating Cl inclusion mechanism to leaves. As regards the concentrations of Ca, Mg, P, K, Na, Fe, Zn and Mn, they were not changed in higher salinity conditions, apart from K, concentrations of which in leaves and roots were significantly increased and decreased, respectively (K translocation to leaves). Salinity further reduced K/Na ratio in root and stem as well as leaf water and osmotic potentials, whereas leaves of control and NaCl-treated plants presented similar turgor potential and K/Na ratio. These data add very important information to our knowledge about the physiological events occurring in sour cherry plants after even short-term exposure to salinity.

scholarly journals Evaluation of NaCl Salinity Tolerance of Four Fig Genotypes Based on Vegetative Growth and Ion Content in Leaves, Shoots, and Roots

HortScience ◽  
2016 ◽  
Vol 51 (11) ◽  
pp. 1427-1434 ◽  
Author(s):  
Mahvash Zarei ◽  
Majid Azizi ◽  
Majid Rahemi ◽  
Ali Tehranifar
Keyword(s):  
Salinity Stress ◽  
Salinity Tolerance ◽  
Growth Parameters ◽  
Dry Weight ◽  
Nacl Stress ◽  
Ion Concentration ◽  
Salinity Treatment ◽  
Tolerance Mechanism ◽  
Shoot Height ◽  
Exclusion Mechanism

The effects of NaCl stress on some growth parameters and ion accumulation in roots, shoots, and leaves of four fig genotypes (S × P, S × K, S × Sh, and S × D) were investigated. Eight-month-old fig plants growing in a mixture of sand, leaf mold, and clay (1:1:1) were irrigated with solutions containing NaCl at various levels: 0.6 (S0), 4 (S1), 6 (S2), and 8 (S3) dS·m−1. Salinity stress decreased growth parameters to a different extent in each genotype. Leaf water potential, stomatal conductance (gS), leaf number, shoot height, and root fresh weight were significantly decreased by salinity; and among the four fig genotypes studied, S × P and S × K were the most sensitive and the most tolerant genotypes, respectively. Furthermore, the highest reduction in shoot diameter and shoot fresh and dry weight were observed in S × Sh and the lowest reduction in S × K. Root dry weight decreased by increasing salinity, mainly in S × D. At S1 salinity treatment in both S × Sh and S × D genotypes, Na+ ion concentration was higher in leaves than in roots, but this pattern was not evident in S × P and S × K genotypes in NaCl treatments below S2 and S3, respectively. Chloride concentrations in all organs increased and were higher in roots than in both leaves and shoots, except in S × D genotype that accumulated more Cl− ion in leaves than in roots at S2 and S3 levels. These results indicate that the ability to sequester Na+ and Cl− ions in roots differs among the genotypes used in this study. Overall, results indicated that salinity tolerance in fig tree is strongly associated with Na+ and Cl− ions exclusion mechanism from shoots. Moreover, to our surprise, salinity stress considerably increased K+ ion concentration in leaves and shoots of salt-sensitive genotypes. Our proposed explanation is that the inability of salt-sensitive fig genotypes to prevent delivery of hazardous ions to shoot is compensated by tissue tolerance mechanism. Keeping high cytosolic K+ ion may lead to better sequestration of Na+ ion in vacuoles and, therefore, enable the genotypes with poor Na+ exclusion mechanism to handle large amounts of Na+ ion in leaves. Finally, S × K is the most salt-tolerant genotype due to efficient exclusion of Na+ and Cl− ions and lower reduction in growth factors.

Evaluation of sugar beet breeding populations based morpho-physiological characters under salinity stress

2018 ◽  
Vol 51 (1) ◽  
Author(s):  
Mehdi Taghizadegan ◽  
Mahmoud Toorchi ◽  
Mohammad Moghadam Vahed ◽  
Samar Khayamim
Keyword(s):  
Sugar Beet ◽  
Salinity Stress ◽  
Breeding Populations ◽  
Physiological Characters

Effects of salinity stress on seed germination and root growth of seedlings in island cotton

2019 ◽  
Vol 45 (1) ◽  
pp. 100
Author(s):  
Qing-Qing YAN ◽  
Ju-Song ZHANG ◽  
Xing-Xing LI ◽  
Yan-Ti WANG
Keyword(s):  
Seed Germination ◽  
Root Growth ◽  
Salinity Stress ◽  
Growth Of Seedlings

scholarly journals Oil and Flower Production in Rosa damascena trigintipetala Dieck under Salinity Stress in Taif Region, Saudi Arabia

2021 ◽  
Vol 13 (8) ◽  
pp. 4547
Author(s):  
Mohamed E. El-Sharnouby ◽  
Metwally M. Montaser ◽  
Sliai M. Abdallah
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Salinity Stress ◽  
Growth Parameters ◽  
Industrial Applications ◽  
Rosa Damascena ◽  
Flower Production ◽  
Survival Percentage ◽  
The Impact ◽  
Tolerance To Salinity

The flower industry depends on oil and fragrance, which is addressed in the current work. Different concentrations of NaCl (0, 250, 500, 1000, and 1500 ppm) were applied to Taif rose plants (Rosa damascena var. trigintipetala Dieck) to evaluate their effects on growth and essential oil content. Results clearly indicated the highest survival percentage (98.3%) was seen in untreated plants compared to plants under salinity stress. Moreover, increasing the NaCl levels induced an adverse effect on the growth parameters of Taif rose plants, while some essential oil contents were increased to the maximum degree of their tolerance to salinity stress. The extracted essential oils were analyzed using GC/MS. The essential oils of Taif rose plants treated with 500 ppm NaCl recorded the highest values of citronellol, geraniol and phenylethyl alcohol contents (16.56, 8.67 and 9.87%), respectively. NaCl at 250 ppm produced the highest values of heneicosane (13.12%), and then decreased to the lowest value (7.79%) with the increase of NaCl to 1500 NaCl, compared to the control and other NaCl levels. The current results could highlight the impact of salinity stress on Rosa damascena Miller var. trigintipetala Dieck for better economic and industrial applications.

scholarly journals Effects of Salinity and Rootstock on Nutrient Element Concentrations and Physiology in Own-Rooted or Grafted to 1103 P and 101-14 Mgt Rootstocks of Merlot and Cabernet Franc Grapevine Cultivars under Climate Change

2021 ◽  
Vol 13 (5) ◽  
pp. 2477
Author(s):  
Kleopatra-Eleni Nikolaou ◽  
Theocharis Chatzistathis ◽  
Serafeim Theocharis ◽  
Anagnostis Argiriou ◽  
Stefanos Koundouras ◽  
...  
Keyword(s):  
Salinity Stress ◽  
Saline Water ◽  
Chlorophyll Concentration ◽  
Co2 Assimilation ◽  
Significant Rise ◽  
Nutrient Concentrations ◽  
Salt Treatment ◽  
Cabernet Franc ◽  
Mediterranean Regions ◽  
Climate Crisis

Under the current and future climate crisis, a significant rise in soil salinity will likely affect vine productivity in several Mediterranean regions. During the present research, the rootstock effects on salinity tolerance of Merlot and Cabernet Franc grapevine cultivars were studied. In a pot hydroponic culture, own-rooted Merlot and Cabernet Franc grapevine cultivars or grafted onto the rootstocks 1103 P and 101-14 Mgt were drip-irrigated with saline water. A completely randomized 3 × 2 × 2 factorial experiment was designed with two vine rootstocks or own-rooted vines, two scion cultivars, and 100 mM NaCl salinity or control treatments, with six replications. A significant effect of scion cultivar, rootstock, and salinity was observed for most of the measured parameters. At the end of salinity stress period, leaf, shoot, root, and trunk nutrient concentrations were measured. Salinity stress increased Chloride (Cl−) and Sodium (Na+) concentrations in all parts of the vines and decreased leaf concentrations of Potassium (K+), Calcium (Ca+2), Magnesium (Mg+2), Nitrogen (N), and Iron (Fe). In contrast, salinity stress increased leaf Boron (B) concentrations, whereas that of Manganese (Mn) remained unaffected. Leaf chlorophyll concentration decreased from 42% to 40% after thirty and sixty days of salt treatment, respectively. A similar trend was observed for the CCM-200 relative chlorophyll content. Salinity significantly decreased steam water potential (Ws), net CO2 assimilation rate (A), and stomatal conductance(gs) in all cases of grafted or own-rooted vines. Sixty days after the beginning of salt treatment, total Phenolics and PSII maximum quantum yield (Fv/Fm) decreased significantly. The rootstock 1103 P seems to be a better excluder for Na+ and Cl− and more tolerant to salinity compared to 101-14 Mgt rootstock.

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