scholarly journals Calcium Nutrition and Cultivar Influence Incidence of Tipburn of Collard

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 544-546 ◽  
Author(s):  
Jon R. Johnson
Keyword(s):  
Brassica Oleracea ◽  
Nutrient Solution ◽  
Foliar Application ◽  
Normal Growth ◽  
Field Studies ◽  
Sand Culture ◽  
Culture Studies ◽  
Calcium Nutrition ◽  
Soil Application ◽  
Young Leaves

The collard (Brassica oleracea, Acephala group) cultivar Vates was more susceptible than `Blue Max' to tipburn in sand-culture and field studies. Calcium concentrations in young leaves were similar for both cultivars. `Blue Max' appears to require a lower Ca concentration in young leaves than `Vates' for normal growth. In sand-culture studies, increasing the Ca level in nutrient solution to 3 mm or higher decreased tipburn in `Vates'. `Blue Max' did not develop tipburn regardless of Ca level. Increasing the Ca level in nutrient solution increased Ca concentration in young and old leaves for both cultivars. Soil application of CaSO4 or foliar application of Ca(NO3)2 or CaCl2 did not decrease occurrence of tipburn in Yates', presumably because these treatments did not increase Ca concentrations in young leaves.

Broccoli (Brassica oleracea var. italica) cultivar response to boron deficiency

1992 ◽  
Vol 72 (3) ◽  
pp. 883-888 ◽  
Author(s):  
B. J. Shelp ◽  
R. Penner ◽  
Z. Zhu
Keyword(s):  
Brassica Oleracea ◽  
Nutrient Solution ◽  
Nutrient Deficiency ◽  
Boron Deficiency ◽  
Fresh Weight ◽  
High Susceptibility ◽  
Inflorescence Development ◽  
Shoot Fresh Weight ◽  
Young Leaves ◽  
Percent Decline

Broccoli (Brassica oleracea var. italica) cultivar, Commander, characterized by low susceptibility to the hollow stem disorder commonly associated with boron (B) deficiency was compared to one with high susceptibility (cv. Stolto) and to two which are grown commercially (cvs. Baccus and Premium Crop). Beginning 3 wk after germination plants grown in a glasshouse in vermiculite were supplied continuously with a nutrient solution containing adequate B (0.5 mg L−1) or none (deficient), or were supplied initially with 0.5 mg B L−1 up to the initiation of inflorescence development after which no B was supplied. All cultivars showed visible symptoms of B deficiency (leaf midrib cracking, stem corkiness, necrotic lesions and hollowing in the stem pith) and reductions in shoot fresh weight with the zero B treatment, but Commander was least affected. Also, the B concentrations of the florets from Commander were highest and showed the lowest percent decline relative to the 0.5 mg B L−1 treatment. When B was removed from the nutrient solution at initiation of inflorescence development, the B concentrations of the florets and young leaves of all cultivars were higher than in the zero B treatment. Compared to the 0.5 mg B L−1 treatment, the B concentrations of old leaves from all cultivars were reduced, but only in Premium Crop was the floret B significantly decreased.Key words: Boron nutrition, Brassica, broccoli, nutrient deficiency, retranslocation

scholarly journals Glucosinolate Enhancement in Cabbage Induced by Jasmonic Acid Application

HortScience ◽  
2010 ◽  
Vol 45 (8) ◽  
pp. 1188-1191 ◽  
Author(s):  
Vincent A. Fritz ◽  
Veronica L. Justen ◽  
Ann M. Bode ◽  
Todd Schuster ◽  
Min Wang
Keyword(s):  
Jasmonic Acid ◽  
Brassica Oleracea ◽  
Human Health ◽  
Foliar Application ◽  
Field Studies ◽  
Climatic Data ◽  
Split Application ◽  
Water Control ◽  
Application Rates ◽  
Glucosinolate Concentration

Glucosinolates (GSL) are bioactive compounds found in cruciferous vegetables that have been shown to have chemopreventive benefits for human health. The objective of this study was to determine whether foliar application of jasmonic acid (JA) increases glucosinolate accumulation and yield in cabbage (Brassica oleracea L. Capitata group). Field studies were conducted in 2004 and 2005 with a green (‘Quisto’) and red (‘Ruby Perfection’) cabbage cultivar. Foliar JA application rates were 0.1 mm, 0.2 mm, and split application of 0.2 mm JA with surfactant, surfactant control, and water control. Yield of both cabbage cultivars was not changed by JA application in both years of the study. In both years, ‘Ruby Perfection’ had significantly higher glucosinolate concentrations than ‘Quisto’ with sinigrin being the predominant glucosinolate in both varieties. JA application consistently increased sinigrin, gluconapin, and glucoiberin concentrations across cultivars and years of the study. JA application also increased progoitrin and total GSL concentrations, but the effect was inconsistent between years and cultivars. In most cases, a split application of 0.2mm JA resulted in the highest GSL accumulation. GSL accumulation was significantly higher in 2005 than 2004 for both cultivars. Climatic data suggest that annual differences in temperature may have influenced the variability in glucosinolate concentration in cabbage.

An experiment to investigate the ameliorative effects of foliar potassium phosphate sprays on salt-stressed strawberry plants

2001 ◽  
Vol 52 (10) ◽  
pp. 995 ◽  
Author(s):  
Cengiz Kaya ◽  
Halil Kirnak ◽  
David Higgs
Keyword(s):  
Nutrient Solution ◽  
Dry Matter ◽  
Foliar Application ◽  
Potassium Phosphate ◽  
Sodium Concentration ◽  
Fruit Yield ◽  
Sand Culture ◽  
Negative Effects ◽  
Nacl Concentration ◽  
Complete Nutrient Solution

A pot experiment was carried out with strawberry (Fragaria ananassa Duch) cvv. Oso Grande and Camarosa in sand culture to investigate the effects of foliar application of 4 mM KH2PO4to plants grown both at high NaCl concentration (35 mM) supplied via roots and in complete nutrient solution. Treatments were (1) nutrient solution (C); (2) nutrient solution + 4 mM KH2PO4 as a foliar application (C+Fo); (3) nutrient solution + 35 mM NaCl (C+S); and (4) nutrient solution + 35 mM sodium chloride + 4 mM KH2PO4as a foliar application twice weekly (C+S+Fo). The plants grown at high NaCl had less dry matter, fruit yield, and chlorophyll content than those grown in normal nutrient solution for both cultivars. Foliar KH2PO4sprays ameliorated the negative effects of salinity on plant growth and fruit yield. Water use by plants decreased with elevated NaCl and increased with foliar KH2PO4 sprays. Membrane permeability increased with high NaCl and was reduced by KH2PO4 sprays. Sodium concentration in plant tissues increased in both cultivars in the high NaCl treatment. Concentrations of P and K were in the deficient range in plants grown at high NaCl and these deficiencies were corrected by foliar KH2PO4.

scholarly journals Enzyme-Sugar Relationships in Immature Sugarcane Treated With Ascorbic Acid, Cysteine, Hydroxylamine, Cyanide, Silicon, and Iron

1969 ◽  
Vol 51 (1) ◽  
pp. 46-54
Author(s):  
Alex G. Alexander
Keyword(s):  
Ascorbic Acid ◽  
Nutrient Solution ◽  
Foliar Application ◽  
Sugar Content ◽  
Foliar Spray ◽  
Sand Culture ◽  
Chemical Additives ◽  
Silicon Iron ◽  
Nutrient Solutions

Immature sugarcane was treated with chemical additives to determine whether significant and predictable changes could be induced in enzyme behavior. All plants were grown in sand culture with controlled nutrient supply. One group received foliar application of ascorbic acid, cysteine, hydroxylamine and cyanide; the other group received silicon, iron, and cyanide as nutrient-solution supplements. Enzymes assayed included acid phosphatases, invertase, amylase, peroxidase, and tyrosinase (polyphenoloxidase). Each of the chemicals tested was known to affect one or more enzymes in vitro. Plants receiving 1,000 p.p.m. of cyanide as a foliar spray increased sucrose in leaves and meristem within 3 days. All enzymes measured were suppressed by CN. Amylase was markedly stimulated by 50 and 1,000 p.p.m. of cysteine. All the enzymes assayed were moderately stimulated by 50 p.p.m. of cysteine, whereas 1,000 p.p.m. caused general suppression. Plants receiving 200 p.p.m. of cyanide as a nutrient-solution supplement were greatly stunted and revealed low sugar content of leaf and meristem tissues. Tyrosinase was about 3 times more active in high-cyanide plants than in controls. Silicon added to nutrient solutions at rates of 20 and 200 p.p.m. greatly retarded invertase and tyrosinase. This confirms similar observations recorded earlier, and it is suggested that enzyme inhibition is a physiological function of silicon in sugarcane. Iron added to nutrient solutions at the rate of 10 p.p.m. caused general enzyme suppression, particularly with regard to meristem peroxidase and invertase. Significance of enzyme regulation in living cane is briefly discussed.

Influence of foliar-applied calcium nitrate on strawberry plants grown under salt-stressed conditions

2002 ◽  
Vol 42 (5) ◽  
pp. 631 ◽  
Author(s):  
C. Kaya ◽  
B. E. Ak ◽  
D. Higgs ◽  
B. Murillo-Amador
Keyword(s):  
Chlorophyll Content ◽  
Nutrient Solution ◽  
Dry Matter ◽  
High Salinity ◽  
Foliar Application ◽  
Calcium Nitrate ◽  
Sodium Concentration ◽  
Fruit Yield ◽  
Sand Culture ◽  
Negative Effects

A pot experiment was carried out with strawberry (Fragaria × ananassa Duch) cultivars Oso Grande and Camarosa in sand culture to investigate the effects of foliar-applied calcium nitrate [Ca(NO3)2] to plants grown at high salinity (NaCl, 35 mmol/L). Treatments were (i) nutrient solution alone (C), (ii) nutrient solution + Ca(NO3)2 (9 mmol/L) as a foliar application (C+Fo), (iii) nutrient solution + NaCl (35 mmol/L) (C+S) and (iv)�nutrient solution + NaCl (35 mmol/L) + Ca(NO3)2 (9 mmol/L) as a foliar application twice weekly (C+S+Fo). The plants grown at high NaCl had less dry matter and lower fruit yield and chlorophyll content than those grown in normal nutrient solution for both cultivars. Foliar Ca(NO3)2 sprays ameliorated the negative effects of salinity on plant growth, chlorophyll content and fruit yield. Membrane permeability increased with high NaCl and was reduced by Ca(NO3)2 sprays. Sodium concentration in plant tissues increased in both cultivars in the high NaCl treatment. Concentrations of calcium and nitrogen were much lower in plants grown in high NaCl than in unstressed plants and foliar Ca(NO3)2 sprays increased concentrations of both nutrients.

scholarly journals Effect of nutrient solution and foliar fertilizers on the characteristics of growth and yield of potato plant Solanum tuberosum L. by sand culture systems

2014 ◽  
Vol 8 (1) ◽  
pp. 12-17
Author(s):  
Samer M. Ahmed ◽  
Sadik Q. Sadik ◽  
Ayyad W. AL-Shahwany
Keyword(s):  
Nutrient Solution ◽  
Agricultural Research ◽  
Foliar Application ◽  
Solanum Tuberosum L ◽  
Block Design ◽  
Dry Weight ◽  
Growth And Yield ◽  
Control Treatment ◽  
Sand Culture ◽  
Randomized Complete Block Design

This study was carried out in green houses at the Twaitha site of Agricultural research directorate, Ministry of Science and Technology during 10 December 2010 to 20 February 2011. The study included effect of combination to fertilizer nutrient solution and foliar application on plants potato in the developing sand culture system Randomized Complete Block Design RCBD were adapted this study 8 treatments of fertilizer. F0 without fertilizer, F1nutrient solution, F2 spray megafol activated amino, F3 spray magnum urea & phosphate, F4 spray agroleaf composite balanced, F1F2 nutrient solution + spraying megafol, F1F3 nutrient solution +spraying magnum and F1F4 nutrient solution + spraying agroleaf . L.S.D. were used to compare the means at 5% level of significances: - The results showed superiority of all treatments fertilizer (nutrient solution with the fertilizer) to the attributes under study compared with control treatment F0, treatment of F1F4 significantly increased number of stem, high of plant cm, leaf area Dcm2 and dry weight of shoots of sand culture reached 4.33 stem/plant ,61.67 cm ,97.35 Dcm2 , 30.40 g Compared with the control treatment. And treatment F1F4 was significantly increased the yield of plant reached 672.00g and no significantly difference with F1F3, F1F2 treatments, while the ratio decreased in the F0 treatment reached 229.00g.

scholarly journals EFFECT OF CULTIVAR AND NUTRIENT SOLUTION CALCIUM CONCENTRATION ON CALCIUM UPTAKE AND DISTRIBUTION IN COLLARDS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1129d-1129
Author(s):  
Jon R. Johnson
Keyword(s):  
Nutrient Solution ◽  
Calcium Concentration ◽  
Calcium Uptake ◽  
Solution Culture ◽  
Physiological Basis ◽  
Culture Studies ◽  
Ca Uptake ◽  
Young Leaves ◽  
Nutrient Solution Culture ◽  
Cultivar Susceptibility

`Vates' is more susceptible to tipburn than `Blue Max' or `Heavi Crop' when grown under high temperature conditions. Nutrient solution culture studies were conducted to determine the influence of cultivar and Ca level in the nutrient solution on Ca uptake and distribution in the plant and to determine the physiological basis for differences in cultivar susceptibility to tipburn. Ca levels in the nutrient solution were 1 and 4,5 mM. Studies were conducted in the greenhouse at 32C during the day and 21C at night. Collard plants were 3 weeks old when the study was initiated. Cultivar and Ca level had no influence on Ca uptake during the first two weeks of the study. Ca uptake by `Blue Max' was greater than by `Vates' or `Heavi Crop' during the 3rd, 4th and 5th weeks of the study. Ca uptake for `Blue Max' was 73 ppm/week whereas for `Vates' and `Heavi Crop' it was 55 and 46 ppm/week, respectively during the 5th week of the study. Increasing the Ca level increased the Ca content of young leaves more for `Blue Max' than for `Vates' or `Heavi Crop'. Ca content of the petiole and stem was higher for `Blue Max' than for `Vates' or `Heavi Crop'. The influence of cultivar and nutrient solution Ca level on uptake and distribution of other nutrients will be discussed.

Effect of foliar application of chelated copper and manganese on yield components and fibre properties of Egyptian cotton (Gossypium barbadense)

1993 ◽  
Vol 121 (2) ◽  
pp. 193-198 ◽  
Author(s):  
Z. M. Sawan ◽  
M. H. Mahmoud ◽  
B. R. Gregg
Keyword(s):  
Yield Components ◽  
Agricultural Research ◽  
Foliar Application ◽  
Field Studies ◽  
Gossypium Barbadense ◽  
Research Centre ◽  
Fibre Properties ◽  
Foliar Sprays ◽  
Egyptian Cotton ◽  
Cotton Cultivar

SUMMARYA decline in supplies of organic manures and the increased use of chemical fertilizers has led to a decrease in the micronutrient content of the soil, with attendant effects on yield.Field studies were conducted in 1986 and 1987 at the Giza Agricultural Research Centre, Egypt, to determine the effect of Cu-EDTA and Mn-EDTA foliar sprays on growth, mineral content, yield components and fibre properties of the Egyptian cotton cultivar Giza 75 (Gossypium barbadense L.).All combinations used significantly increased the uptake of Cu and Mn and the dry matter yield. The earliness of harvest and the value of yield components were all increased by the application of Cu or Mn; 25 mg/1 of both Cu and Mn gave the highest values. Lint percentage and fibre properties were not significantly affected.This study indicated that the yield of cotton, grown under otherwise standard conditions, may be increased by foliar sprays of Cu-EDTA and Mn-EDTA combined.

Application of natural and synthetic polyamines as growth regulators to improve the freezing tolerance of winter wheat (Triticum aestivum L.)

2012 ◽  
Vol 60 (1) ◽  
pp. 1-10 ◽  
Author(s):  
D. Todorova ◽  
I. Sergiev ◽  
V. Alexieva
Keyword(s):  
Winter Wheat ◽  
Foliar Application ◽  
Normal Growth ◽  
Triticum Aestivum L ◽  
Growth Conditions ◽  
Freezing Stress ◽  
Preliminary Treatment ◽  
Fresh Weight ◽  
Soil Culture ◽  
Weight Losses

Wheat cultivars were grown as soil culture under normal growth conditions. Twoweek- old seedlings were exposed to 4°C for 6 h and then transferred to −12°C for 24 h in the dark. Twenty-four hours before freezing stress, some of the plants were sprayed with aqueous solutions of spermine, spermidine, putrescine, 1,3-diaminopropane (1,3-DAP) and diethylenetriamine (DETA). The data showed that freezing stress caused a decrease in the fresh weight, chlorophyll content and plant survival rate, accompanied by a simultaneous accumulation of free proline and the enhanced leakage of electrolytes. Preliminary treatment with polyamines caused a decline in electrolyte leakage and a considerable augmentation in proline quantity, indicating that the compounds are capable of preventing frost injury. Additionally, the foliar application of polyamines retarded the destruction of chlorophyll, and lessened fresh weight losses due to freezing stress. The synthetic triamine DETA was the most effective, having the most pronounced action in all the experiments, followed by the tetraamine spermine. The application of polyamines to wheat crops could be a promising approach for improving plant growth under unfavourable growth conditions, including freezing temperatures. The results demonstrate that treatment with polyamines could protect winter wheat by reducing the stress injuries caused by subzero temperatures.

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