Alleviation of Salinity - Induced Stress in Cash Crops by Multi-K (Potassium Nitrate), Five Cases Typifying the Underlying Pattern

Achilea, O.

doi:10.17660/actahortic.2002.573.4

Cited by 19 publications

(17 citation statements)

References 12 publications

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“…In this study and in agreement with previous studies, Salinity reduced plant height (Achilea et al, 2002;Agong et al, 2004;Hajer et al, 2006) and leaf area (Li and Stanghelni, 2001;Mulholland et al, 2002;Maggio et al, 2004;Agong et al, 2004), fresh weight (Hassan et al, 1999;Sonneveld, 2000;Amico et al, 2003;Hajer et al, 2006) as well as dry weight (Li, 2000). Salinity affects plant growth by weakening the plant's abity to absorb water from the bed it ves in.…”

Section: Discussionsupporting

confidence: 91%

“…Young seedngs and plants at the flowering stage seem to be more sensitive than mature stages (Lutts et al, 1995). Salt tolerance of plants can be grouped in three categories: (Achilea et al, 2002) exclusion of salt followed by transport and compartmentation of salt, (Adams, 1988) morphological features and biomass distribution of plant shoots and roots and (Adams, 1991) physiological and metaboc events that counteract the presence of salt at cellular level (Winicov, 1998). Other workers have nked NaCl stress with macronutrient deficiencies, for example high NaCl concentration has been shown to induce phosphorus and potassium deficiencies in tomato (Adams, 1988(Adams, , 1991Takase et al, 2010) and in cucumber (Sonneveld and de Kreij, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Study of the Effects Irrigation Water Sanity and pH on Production and Relative Absorption of some Elements Nutrient by the Tomato Plant

Afshari¹

2011

American Journal of Applied Sciences

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Problem statement:This study was conducted to examine the effects of irrigation water pH and Salinity on the growth and absorption of P, Na, Ca, K by tomato. Approach:The study includes two Salinity and pH factors and is consisted from 12 treatment and three repetitions. Tomato seeding grown in foam trays were transplanted in the joune 2010 to bags filled with perte in an Greenhouse at Damghan Islamic Azad University of Iran. Plant were divided into groups then irrigated with the targeted sane and pH levels. Plants were hand-irrigated with fresh water and fertized with required nutritional solutions were prepared based on bed nutrients mitation. Greenhouse temperature was maintained in suitable level using air conditioner and its humidity was controlled by hygrometer and adjusted in the range of 60-80%. Water Salinity factors were consisted from four levels (0, 3, 6 and 9 dsm −1 ) and pH factor was consisted from three levels (6.5, 7.5 and 8.5). Salinity and pH treatments were adjusted with Nacl and H 2 SO 4 /N 2 CO 3 salts respectively. Study of the effects of Salinity and pH level on tomato were recorded and controlled depending on number of growing fruit, fertized flowers, plant dry weight, plant height, percentage of P, Na, Ca, K in leaves. Then results were studied by Anova Variance Analysis using SAS software and obtaining significant results, Dunken test was used for comparison of average levels in probabity level of 5%. Results: Data showed that all growth parameters such as plant height, leaf area, plant dry weight, percentage of P,Ca,K in leave responded negatively as the Salinity and pH level increased. Only Na + content in the leaves responded positively to increment in Salinity and pH level. Conclusion: Based on results, Salinity reduced plant height as well as dry weight and increasing of Salinity and pH increased supply of Na+ in tomato leaf.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Study of the Effects Irrigation Water Sanity and pH on Production and Relative Absorption of some Elements Nutrient by the Tomato Plant

Afshari¹

2011

American Journal of Applied Sciences

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“…For example, crisphead lettuce and Chinese cabbage grown in increasing levels of potassium nitrate (KNO 3 ) (1, 5, or 10 mM) showed maximum yield at 5 mM, decreased leaf sodium (Na) and chloride (Cl) content, and increased leaf N and K content in both saline and non-saline conditions [16]. Moreover, Tzortzakis [17] reported that Ca and K enrichment alleviated salinity-induced stress in hydroponically grown endives.…”

Section: Introductionmentioning

confidence: 99%

Effects of Elevated Temperature and Potassium on Biomass and Quality of Dark Red ‘Lollo Rosso’ Lettuce

2018

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Abstract:Lettuce is an economically important crop for small and medium-sized growers. When grown in adverse environmental conditions, lettuce is vulnerable to a deterioration of yield and quality. Research concerning the impact of elevated potassium (K) levels on leafy vegetables, such as lettuce, is lacking. Therefore, seeds of dark-red 'Lollo' lettuce were germinated under greenhouse conditions at 25/20 • C (day/night). Plants were transferred into 11-L containers and placed into growth chambers at 25 and 33 • C. Plants were grown with K treatments of 117.3 (control), 234.6 (2×), 469.2 (4×), and 4) 938.4 (8×) mg·L −1 . Increasing K treatments resulted in a negative quadratic response on lettuce dry mass and generated 14% more leaf calcium at 234.6 mg·L −1 . An increase in temperature from 25 to 33 • C increased leaf dry matter and biomass by 40% and 43%, respectively. Leaf water content increased by 3% as temperature increased. Plants grown at 33 • C had greater quercetin glycosides compared to plants grown at 25 • C. The results from this study suggest that temperature is a stronger regulatory factor than increasing K in the determination of lettuce yield and quality. Increasing K concentration to 234.6 mg·L −1 results in greater concentrations of leaf minerals without compromising plant yield.

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“…Each plant has a salinity tolerance limit above which yield is reduced in a linear fashion, which is called the salinity threshold (ST). Thus, salination (50 mmol/l NaCl) of the nutrient solution of greenhouse tomatoes markedly decreased K content of the leaves, fruit-set rate, number of flowers, dry weights of the plants, fruit sizes, and stem heights (Achilea 2002). Salttreated (1% NaCl) endive and fennel had decreased marketable yield by about 60%, but for lettuce (Lactuca sativa L.) yield was reduced about 15% (lettuce and endive appeared to be more sensitive to tipburn and necrotic symptoms occurring in the crop under saline-sodic conditions).…”

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confidence: 99%

Potassium and calcium enrichment alleviate salinity-induced stress in hydroponically grown endives

Tzortzakis¹

2010

Hort. Sci. (Prague)

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Tzortzakis N.G., 2010. Potassium and calcium enrichment alleviate salinity-induced stress in hydroponically grown endives. Hort. Sci. (Prague), 37: 155-162.Salinity either of soil or of irrigation water causes disturbance in plant growth and nutrient balance and reduces crop yields. The effects of NaCl salinity and/or calcium or potassium level on the plant growth and severity of gray mold (Botrytis cinerea [De Bary] Whetzel) were investigated in endive (Cichorium endivia L., cv. Green Curled) grown with the nutrient film technique under greenhouse conditions during early spring. Plants were supplied with nutrient solutions containing 40 mmol/l of sodium chloride (NaCl) and/or 10 mmol/l potassium sulphate (K 2 SO 4 ). Additionally, plants treated with foliar spray of 15 mmol/l calcium nitrate [(CaNO 3 ) 2 ] or distilled water. Salinity or K-and Ca-enrichment mainly affected the upper part of endive plants and reduced leaf area. However, when salinity combined with either K-or Ca-enrichment, the negative impact of salinity on plant growth was reversed. Salinized and/or K-and Ca-enriched, plants did not differ in plant biomass, leaf/root ratio, leaf fresh weight, leaf number, and root length. Salinity did not have any impacts on photosynthetic rate, stomatal conductance, and intercellular CO 2 concentration. Indeed, photosynthetic rate and stomatal conductance increased with Ca foliar application and decreased with K while the opposite effects were observed for the intercellular CO 2 concentration. Total nutrient uptake was reduced 2-fold in salt-treated plants compared to controls. No symptoms of tip-burn or blackheart were recorded throughout the experimental study. Endive grown in the nutrient film technique had tolerance to NaCl salinity, and this method could be used to exploit saline water in soilless culture. These findings also suggest that a proper management of the salt concentration of the nutrient solution plus external elemental enrichment may provide an efficient tool to improve the quality of leafy vegetables with little effect on yield.

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Alleviation of Salinity - Induced Stress in Cash Crops by Multi-K (Potassium Nitrate), Five Cases Typifying the Underlying Pattern

Cited by 19 publications

References 12 publications

Study of the Effects Irrigation Water Sanity and pH on Production and Relative Absorption of some Elements Nutrient by the Tomato Plant

Study of the Effects Irrigation Water Sanity and pH on Production and Relative Absorption of some Elements Nutrient by the Tomato Plant

Effects of Elevated Temperature and Potassium on Biomass and Quality of Dark Red ‘Lollo Rosso’ Lettuce

Potassium and calcium enrichment alleviate salinity-induced stress in hydroponically grown endives

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