Effects of Salinity on Photosynthetic Pigments, Respiration, and Water Content in Two Barley Varieties

Khosravi-Nejad, Fariba; Heydari, Ramin; Farboodnia, T.

doi:10.3923/pjbs.2008.2438.2442

Cited by 33 publications

(21 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consistent with previous findings (Tewari et al 2004;Ayala-Silva and Beyl 2005;Khosravinejad et al 2008), we noted a decrease in the concentrations of total chlorophyll in D and C ? S plants.…”

Section: Discussionsupporting

confidence: 94%

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

et al. 2011

View full text Add to dashboard Cite

Hordeum maritimum (Poacea) is a facultative halophyte potentially useful for forage production in saline zones. Here, we assessed whether moderate NaCl-salinity can modify the plant response to phosphorus (P) shortage. Plants were cultivated for 55 days under low or sufficient P supply (5 or 60 lmol plant -1 week -1 KH 2 PO 4 , respectively), with or without 100 mM NaCl. When individually applied, salinity and P deficiency significantly restricted whole-plant growth, with a more marked effect of the latter stress. Plants subjected to P deficiency showed a significant increase in root growth (as length and dry weight) and root/ shoot DW ratio. Enhanced root growth and elongation presumably correspond to the well-known root adaptive response to mineral deficiency. However, leaf relative water content, leaf P concentration, and leaf gas exchange parameters were significantly restricted. The interactive effects of salinity and P deficiency were not added one to another neither on whole plant biomass nor on plant nutrient uptake. Indeed, 100 mM NaCl-addition to P-deficient plants significantly restored the plant growth and improved CO 2 assimilation rate, root growth, K ? /Na ? ratio and leaf proline and soluble sugar concentrations. It also significantly enhanced leaf total antioxidant capacity and leaf anthocyanin concentration. This was associated with significantly lower leaf osmotic potential, leaf Na ? and malondialdehyde (MDA) concentration. Taken together, these results suggest that mild salinity may mitigate the adverse effects of phosphorus deficiency on H. maritimum by notably improving the plant photosynthetic activity, the osmotic adjustment capacity, the selective absorption of K ? over Na ? and antioxidant defence.

show abstract

Section: Discussionsupporting

confidence: 94%

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

et al. 2011

View full text Add to dashboard Cite

show abstract

“…In fact, TN11.11 chlorophyll's content was affected by salinity, while this parameter was not affected in TN8.7 plants. This result corroborates previous studies on barley, showing that the decrease of chlorophyll content in salt-sensitive variety EMB82-12 was higher than that observed in salt-tolerant variety Afzal (Khosravinejad et al 2008). Based on plant growth and chlorophyll status, it seems that TN8.7 line is more tolerant to salinity than TN11.11 one.…”

Section: Discussionsupporting

confidence: 94%

Responses of two lines of Medicago ciliaris to Fe deficiency under saline conditions

et al. 2011

View full text Add to dashboard Cite

The aim of this research was to study the responses of two lines of Medicago ciliaris: TN11.11 and TN8.7 to iron deficiency under saline conditions. However; the paper showed also the results of a preliminary study which report the contrastive responses of the two lines to salinity. We found that plant growth and chlorophyll content of TN11.11 line were more affected by salinity than TN8.7. The severity of symptoms was linked to the sodium accumulation in shoots as well as a limitation of potassium uptake. Our data allowed us to note that TN8.7 line is less sensitive and can better cope with the salinity. Concerning the effect of salinity on iron deficiency responses, we noted that root PM H ? -ATPase and FCR activities were reduced when iron deficiency was associated with salinity. This probably explained the decrease of Fe uptake. On the contrary, PEPC activity was not affected.

show abstract

“…This fact may be related with the senescence-dependent decline of cotyledon metabolism (Kim 2004). Chlorophyll and carotenoid contents also decreased in salt-treated cotyledons of quinoa seedlings, but in a smaller percentage than observed in other species (Khosravinejad et al 2008;Meloni et al 2008). Parida and Das (2005) suggest in their review that the decrease in chlorophyll and carotenoid contents of leaves in response to salt stress is a general phenomenon.…”

Section: Discussionmentioning

confidence: 89%

The role of cotyledon metabolism in the establishment of quinoa (Chenopodium quinoa) seedlings growing under salinity

Ruffino¹,

Rosa²,

Hilal³

et al. 2009

Plant Soil

View full text Add to dashboard Cite

A growth chamber experiment was conducted to assess the effect of salinity on emergence, growth, water status, photosynthetic pigments, osmolyte accumulation, and ionic content of quinoa seedlings (Chenopodium quinoa). The aim was to test the hypothesis that quinoa seedlings are well adapted to grow under salinity due to their ability to adjust the metabolic functionality of their cotyledons. Seedlings were grown for 21 days at 250 mM NaCl from the start of the germination. Germination percentage and cotyledon area were not affected by salt whereas seedling height decreased 15%. FW increased in both control and salt-treated cotyledons, but the increase was higher under salinity. DW only increased in salttreated cotyledons. The DW/FW ratio did not show significant differences between treatments. Relative water content, chlorophyll, carotenoids, lipids, and proteins were significantly lower under salinity. Total soluble sugars, sucrose and glucose concentrations were higher in salt-treated than in control cotyledons. Ion concentration showed a different distribution pattern. Na + and Cl − concentrations were higher under salinity, while an inverse result was observed for K + concentration. Proline and glycinebetaine concentrations increased under salinity, but the increase was higher in the former than the latter. The osmoprotective role of proline, glycinebetaine, and soluble sugars is discussed.

show abstract

Effects of Salinity on Photosynthetic Pigments, Respiration, and Water Content in Two Barley Varieties

Cited by 33 publications

References 19 publications

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

Responses of two lines of Medicago ciliaris to Fe deficiency under saline conditions

The role of cotyledon metabolism in the establishment of quinoa (Chenopodium quinoa) seedlings growing under salinity

Contact Info

Product

Resources

About