Ecophysiological studies onEuphorbia paraliasunder soil salinity and sea water spray treatments

Elhaak, M. A.; Migahid, Masarrat M.; Wegmann, K.

doi:10.1006/jare.1995.0151

Cited by 14 publications

(10 citation statements)

References 10 publications

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“…Determination of chlorenchyma cell sap titratable acidity during both the wet and the dry seasons indicated existence of diurnal acidificationÁdeacidification cycles denoting operation of the obligate CAM. This CAM physiotype has previously been reported in some stem succulent Euphorbia species (Pearcy & Troughton 1975;Willert et al 1985;Martin et al 1990;Van Damme 1991;Mies et al 1996;Elhaak et al 1997;Winter et al 2005;Ameh 2006;Feakins and Sessions 2010). Nocturnal CO 2 uptake and daytime stomatal closure characteristic of CAM imply avoidance of gas exchange when environmental conditions favor transpirational water loss and hence enhanced plant water economy (Walker & Leegood 1996;Winter & Smith 1996;Borland et al 2000;Sayed 2001b;Luttge 2004;Lu¨ttge 2008;Herrera 2009).…”

Section: Discussionsupporting

confidence: 74%

Photosynthetic adaptation ofEuphorbia fractiflexa(Euphorbiaceae) and survival in arid regions of the Arabian Peninsula

Al‐Turki

Masrahi

Sayed

2013

Journal of Plant Interactions

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Arid regions of the Arabian Peninsula are characterized by a short wet season with erratic rainfall, high temperature, and high evaporation. In these arid regions, the leafless stem succulent Euphorbia fractiflexa S. Carter & J.R.I.Wood (Euphorbiaceae) is an abundant perennial. Work presented in this paper aimed at investigating crassulacean acid metabolism (CAM) as a physiological adaptation crucial for survival of E. fractiflexa in arid regions of the Arabian Peninsula. Work involved investigations of stomatal diffusive conductance, chlorophyll fluorescence, and cell sap titratable acidity. Results represent the first report of obligate CAM in E. fractiflexa. Low values of stomatal conductance and dampening of CAM acidificationÁ deacidification cycles during the long dry season also denoted tendency of this species to shift from obligate CAM to CAM-idling. Results also showed water stress-induced reduction in Photosystem II (PSII) activity occurring in concomitance with increased non-photochemical quenching of chlorophyll fluorescence denoting operation of non-photochemical energy dissipation mechanisms that are important for photoprotection of the photosynthetic machinery under stress conditions.

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Section: Discussionsupporting

confidence: 74%

Photosynthetic adaptation ofEuphorbia fractiflexa(Euphorbiaceae) and survival in arid regions of the Arabian Peninsula

Al‐Turki

Masrahi

Sayed

2013

Journal of Plant Interactions

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“…El-Ghonemy et al, 1978;Abdel-Razik, 1980), and nutritive values for the grazing animals (Batanouny & Zaki, 1973;El-Kady, 1980). Few studies have been carried out by Elhaak et al (1992Elhaak et al ( , 1997 on the photosynthetic pigment content, activity and their relationship with adaptations to the prevailing harsh environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Studies of plant adaptation to salinity stress were conducted in the field on desert species exposed to different salinity levels in their native habitats (Migahid et al, 1996) or in the laboratory (Elhaak et al,1997). Such studies are important for understanding the mechanisms by which the plant species from the northern part of Egypt tolerate and adapt to salinity stress.…”

Section: Introductionmentioning

confidence: 99%

Effect of salinity shock on some desert species native to the northern part of Egypt

Migahid

2003

Journal of Arid Environments

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“…It is well documented that plants are often more sensitive to saline spray than to salt applied at the root zone (Grattan et al, 1981;Elhaak et al, 1997). It suppresses plant growth, disrupts water balance, membranes and enzyme systems (Rozema et al, 1985), inhibits nutrient uptake (Scheiber et al, 2008) and causes necrotic damage (Griffiths & Orians, 2003;Griffiths et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Responses of Kyllinga peruviana Lam. to Sea Water Spray

Kekere¹

2014

JPS

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Response of Kyllinga peruviana Lam. to salt spray was studied to have an insight into the ecophysiological adaptations underlying the responses. Plants were exposed to foliar salt spray at: two sprays per week (2SS), four sprays per week (4SS) or six sprays per week (6SS), while those sprayed with de-ionized water served as control (CSS). Salt spray did not affect plant survival but had negative effect on growth. The growth parameters decreased except stem girth, which increased significantly in plants sprayed with seawater. Fresh and dry mass of plant parts were significantly lower under seawater treatment than in control. Total biomass, the relative growth rate and leaf total chlorophyll decreased while the root: shoot ratio increased under seawater application. Air-borne salt reduced plant xylem water potential but increased stem succulence for ion dilution. Salt spray accumulated Na+ and Cl-in the aerial parts, resulting in an increased total nutrient and percentage ash content, which culminated in ion toxicity. Salt spray reduced uptake of some essential nutrients but increased N in the aerial parts of seawater-treated plants showing the presence of salt-related nitrogen compounds for osmotic adjustment. Significantly higher values were obtained for Na: K in plants exposed to salt spray than in the control. It led to reduction in stomata density and number of stomata per leaf by as much as 42.86% and 80.42% respectively at 6SS. Air-borne salt caused necrotic damage on the leaf with increasing application level. Generally, salt spray had no effect on the root growth. Kyllinga peruviana tolerates sea water spray by the development of some adaptations to withstand salt-related stress associated with the strandline environment.

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Ecophysiological studies onEuphorbia paraliasunder soil salinity and sea water spray treatments

Cited by 14 publications

References 10 publications

Photosynthetic adaptation ofEuphorbia fractiflexa(Euphorbiaceae) and survival in arid regions of the Arabian Peninsula

Photosynthetic adaptation ofEuphorbia fractiflexa(Euphorbiaceae) and survival in arid regions of the Arabian Peninsula

Effect of salinity shock on some desert species native to the northern part of Egypt

Responses of Kyllinga peruviana Lam. to Sea Water Spray

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