Effect of NaCl on citrus cultivars

We investigated the effects of salinity stress-relief on the growth and mineral composition (leaf and root) of one-year-old seedlings of Cleopatra mandarin (Citrus reticulata Blanco) and Sour orange (Citrus aurantium [L]). Salinization reduced plant dry weight more in Sour orange than in Cleopatra mandarin plants, although there was no correlation between Cl and Na concentration in leaves and shoot fresh weight reduction. We observed that regulation of Na + and Cl - uptake and transport from root to shoot appear to involve different mechanisms which break down during a long period of salinization. Salinity induced a decrease in K + , Ca 2+ and total N in Cleopatra mandarin leaves and an increase in K + in Sour orange leaves. Growth of both cultivars was not recovered totally in the relief period, since relative growth rates of recovered plants were lower than for control plants after 60 days of relief.

[1]  M. Zekri,et al.  Salinity tolerance of citrus rootstocks: Effects of salt on root and leaf mineral concentrations , 1992, Plant and Soil.

[2]  S. Sykes.  The inheritance of salt exclusion in woody perennial fruit species , 1992, Plant and Soil.

[3]  A. Läuchli,et al.  The nutritional status of the apical meristem of Lactuca sativa as affected by NaCl salinization: An electron-probe microanalytic study , 1991, Planta.

[4]  J. Lynch,et al.  Potassium transport in salt-stressed barley roots , 1984, Planta.

[5]  J. Syvertsen,et al.  Gas exchange, chlorophyll and nutrient contents in relation to Na+ and Cl− accumulation in ‘Sunburst’ mandarin grafted on different rootstocks , 2002 .

[6]  William S. Castle,et al.  Citrus Rootstock Usage, Characteristics, and Selection in the Florida Indian River Region , 2002 .

[7]  K. Chartzoulakis,et al.  Response of Sultana vines (V. vinifera L.) on six rootstocks to NaCl salinity exposure and recovery , 2001 .

[8]  V. Martínez,et al.  Demarcating specific ion (NaCl, Cl−, Na+) and osmotic effects in the response of two citrus rootstocks to salinity , 1999 .

[9]  Francisco Nunes Correia,et al.  Water Resources in the Mediterranean Region , 1999 .

[10]  M. Blom-Zandstra,et al.  Sodium fluxes in sweet pepper exposed to varying sodium concentrations , 1998 .

[11]  E. Primo-millo,et al.  Kinetics of nitrate uptake by Citrus seedlings and inhibitory effects of salinity , 1997 .

[12]  R. Stevens,et al.  Separating the Effects of Foliar and Root Salt Uptake on Growth and Mineral Composition of Four Grapevine Cultivars on their Own Roots and on 'Ramsey' Rootstock , 1996 .

[13]  R. Gucci,et al.  Growth, gas exchange and ion content in Olea europaea plants during salinity stress and subsequent relief , 1995 .

[14]  A. Hamdy,et al.  Water Crisis in the Mediterranean: Agricultural Water Demand Management , 1995 .

[15]  R. Storey.  Salt tolerance, ion relations and the effect of root medium on the response of citrus to salinity , 1995 .

[16]  M. F. García-Legaz,et al.  Effect of salinity on growth, ion content and CO2 assimilation rate in lemon varieties on different rootstocks , 1993 .

[17]  E. Maas.  Salinity and citriculture. , 1993, Tree physiology.

[18]  R.R. Walker,et al.  Carbon Dioxide Assimilation and Foliar Ion Concentrations in Leaves of Lemon (Citrus limon L.) Trees Irrigated With Nacl or Na2SO4 , 1993 .

[19]  R. Munns.  Physiological processes limiting plant growth in saline soils: some dogmas and hypotheses , 1993 .

[20]  S. Grattan,et al.  Mineral element acquisition and growth response of plants grown in saline environments , 1992 .

[21]  J. Lloyd,et al.  Contrasts between Citrus species in response to salinisation: An analysis of photosynthesis and water relations for different rootstock‐scion combinations , 1990 .

[22]  R. Walker,et al.  Effects of salinity on ionic content, water relations and gas exchange parameters in some citrus scion—Rootstock combinations , 1986 .

[23]  R.R. Walker.  Sodium Exclusion and Potassium-Sodium Selectivity in Salt-Treated Trifoliate Orange (Poncirus trifoliata) and Cleopatra Mandarin (Citrus reticulata) Plants , 1986 .

[24]  E. Zid,et al.  Sodium-calcium interactions in leaves of Citrus aurantium grown in the presence of NaCl , 1985 .

[25]  L. Prior,et al.  Water Relations and Ion Concentrations of Leaves on Salt-stressed Citrus Plants , 1983 .

[26]  R.R. Walker,et al.  Effect of Salinity Level on Uptake and Distribution of Chloride, Sodium and Potassium Ions in Citrus Plants , 1983 .

[27]  P. Kriedemann,et al.  An Analysis of Photosynthetic Response to Salt Treatment in Vitis vinifera , 1981 .

[28]  R. Munns,et al.  Mechanisms of salt tolerance in nonhalophytes. , 1980 .

[29]  J. P. Riley,et al.  A modified single solution method for the determination of phosphate in natural waters , 1962 .