Effects of high salinity irrigation on growth, gas-exchange, and photoprotection in date palms (Phoenix dactylifera L., cv. Medjool)

Sperling, Or; Lazarovitch, Naftali; Schwartz, Amnon; Shapira, Or

doi:10.1016/j.envexpbot.2013.10.014

Cited by 70 publications

(61 citation statements)

References 55 publications

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“…There are controversial reports regarding the maximum level of salinity that the date palm can withstand. While some research groups reported an insignificant reduction in yield when plants were watered with a NaCl solution up to 24 dS/m (Aljuburi 1992), other reports demonstrated a significant destructive effect on date palm growth and yield when watered with a NaCl solution at concentrations between 4 and 10 dS/m (Sperling et al, 2014). The inconsistency in these results is likely due to the use of different date palm varieties and the application of salt treatments at different growth stages of plant development.…”

Section: Effect Of Abiotic Stress On the Phenotypecontrasting

confidence: 43%

Short Communication Proline accumulation is a general response to abiotic stress in the date palm tree (Phoenix dactylifera L.)

Yaish¹

2015

Genet. Mol. Res.

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ABSTRACT. Plants exposed to certain abiotic stress conditions tend to produce the amino acid proline, which acts as an active osmolyte, a metal chelator, an antioxidant, and a signaling molecule. There is increasing evidence that proline accumulates in plants due to a wide range of abiotic stress, in particular high soil salinity and drought. Therefore, proline content is often used as a marker-assisted breeding tool aimed at improving drought and salinity tolerance. In this study, it was investigated whether proline accumulation in date palm (Phoenix dactylifera L.) seedlings occurs solely due to high salinity and drought stresses or due to other unspecified abiotic stresses, including salinity and salinity shock, drought, extreme temperatures, and abscisic acid. The free proline assays revealed that this amino acid over-accumulated in the roots and leaves of each stresstreated plant, and was remarkably high when leaves were exposed to suboptimum temperatures and salinity stress. These results indicate that the production of proline is a common response to various abiotic stresses and its differential accumulation cannot be used as a molecular marker in date palm breeding programs aimed at improving drought or salinity 9943-9950 (2015) tolerance traits in date palms. This conclusion is consistent with the theory that the molecular outcomes of abiotic stresses are often non-specific.

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Section: Effect Of Abiotic Stress On the Phenotypecontrasting

confidence: 43%

Short Communication Proline accumulation is a general response to abiotic stress in the date palm tree (Phoenix dactylifera L.)

Yaish¹

2015

Genet. Mol. Res.

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“…The reduction in photosynthesis can be direct, such as a decrease in CO 2 concentration caused by stomatal closure or mesophyll conductance [38,39]. This CO 2 limitation of A has previously been reported for other date palm cultivars, including Khalas, which is used in the present study [21,23]. Similarly, these same tolerant cultivars maintained relatively higher Qy levels compared to all of the other cultivars ( Figure 1F), as well as a high leaf area (Figure 3), which indicates that stomatal limitation and damage to photosynthetic machinery are major contributing factors in photosynthetic reduction and, consequently, growth reduction in the sensitive cultivars.…”

Section: Discussionmentioning

confidence: 81%

“…However, salt stress negatively affects various components of the photosynthetic process, including stomatal closure and the inhibition of mesophyll conductance to CO2 diffusion, which limit CO2 availability for carboxylation, as well as chlorophyll content and damage to the photosynthetic machinery, with reduced or arrested electron transport for the production of reductants (NADPH) and ATP for the Calvin cycle [21]. Interestingly, a clear interaction effect between the cultivars and the treatments in terms of most photosynthesis parameters was found in this study, therefore, this notion is consistent with the previously published works [21].…”

Section: Discussionmentioning

confidence: 99%

Screening of Date Palm (Phoenix dactylifera L.) Cultivars for Salinity Tolerance

Kharusi

Assaha

Al-Yahyai

et al. 2017

Forests

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Abstract:Date palm (Phoenix dactylifera L.) is a major fruit tree in the Middle East and it is a plant considered to be tolerant to a variety of abiotic stresses, including salinity. However, the physiological basis of its salinity tolerance is not fully known. The objective of this study was to screen Omani date palm cultivars for tolerance or susceptibility to salt stress. Seedlings from 10 commercially important date palm cultivars were subjected to 240 mM NaCl, and several physiological parameters related to salinity tolerance traits were evaluated upon treatment. The cultivars were divided into two groups based on the dry weight (DW) of their leaf and root tissues, a parameter which was used as an indication of healthy growth. The results revealed that photosynthesis, electrolyte leakage (EL), and the shoot K + /Na + ratio were all significantly reduced in the susceptible cultivars. In addition, the relative water content was higher in the tolerant cultivars in comparison with the susceptible ones. These results suggest that although date palm is tolerant to high salinity, there is variation in tolerance among different cultivars. Shoot Na + exclusion, photosynthesis, and membrane stability are apparently the main determinants of tolerance and can be used in salinity tolerance screening of date palm. The results have shown new very tolerant cultivars (Manoma and Umsila) that could serve as genetic resources for improved date palm tolerance to salinity.

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“…Electrolyte conductivity was measured at boiling (C1) and room temperatures (C2). The membrane permeability of fresh leaf tissues was calculated as Percent EC (C1/C2)×100 (Sperling et al, 2014).…”

Section: Measurement Of Membrane Permeability Malondialdehyde Contenmentioning

confidence: 99%

Promotive effects of 5-Aminolevulinic acid on growth, photosynthetic gas exchange, chlorophyll, and antioxidative enzymes under salinity stress in Prunnus persica (L.) Batseh Seedling

Ye¹,

Chen²,

Tao³

et al. 2016

Emir. J. Food Agric

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Effects of high salinity irrigation on growth, gas-exchange, and photoprotection in date palms (Phoenix dactylifera L., cv. Medjool)

Cited by 70 publications

References 55 publications

Short Communication Proline accumulation is a general response to abiotic stress in the date palm tree (Phoenix dactylifera L.)

Short Communication Proline accumulation is a general response to abiotic stress in the date palm tree (Phoenix dactylifera L.)

Screening of Date Palm (Phoenix dactylifera L.) Cultivars for Salinity Tolerance

Promotive effects of 5-Aminolevulinic acid on growth, photosynthetic gas exchange, chlorophyll, and antioxidative enzymes under salinity stress in Prunnus persica (L.) Batseh Seedling

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