scholarly journals EFFECT OF THE FORM OF THE AVAILABLE NITROGEN ON THE CALCIUM DEFICIENCY SYMPTOMS IN THE BEAN PLANT

1941 ◽  
Vol 16 (1) ◽  
pp. 145-157 ◽  
Author(s):  
John Skok
Keyword(s):  
Calcium Deficiency ◽  
Bean Plant ◽  
Available Nitrogen ◽  
Deficiency Symptoms

Response of plants to calcium concentration in solution culture

1968 ◽  
Vol 19 (6) ◽  
pp. 845 ◽  
Author(s):  
JF Loneragan ◽  
K Snowball ◽  
WJ Simmons
Keyword(s):  
Maximum Growth ◽  
Calcium Deficiency ◽  
Solution Culture ◽  
Growth Stages ◽  
Culture Techniques ◽  
Deficiency Symptoms ◽  
Nutrient Culture ◽  
Low Concentrations ◽  
Severe Deficiency ◽  
Wide Range

Calcium concentrations required in solution for growth of 30 grasses, cereals, legumes, and herbs were defined for a wide range of concentrations which were maintained constant in Bowing culture solutions of pH 5.7. Contrary to published results obtained with standard nutrient culture techniques, some legumes and herbs grew much better at low concentrations of calcium (2.5 and 10µM ) than many Gramineae. The minimal concentration required to produce maximum growth of plants and eliminate calcium deficiency symptoms varied widely (2.5–1000 µM) within each group; it varied over the same range for Gramineae as for legumes and herbs. At 100 µM all plants grew well without symptoms of calcium deficiency. Increasing the concentration to 1000 µM increased growth in only a few species. At concentrations < l µM , severe deficiency symptoms developed on the tops of all species. The growth of legumes and herbs was more quickly and more severely affected than that of Gramineae. The roots of many legumes and herbs also degenerated rapidly. In the same solutions the roots of all Gramineae appeared healthy for some time. However, the advantage of Gramineae in these solutions was transitory, since the high relative growth rate in their early growth stages fell rapidly. It is suggested that distinct processes dominate the plants' behaviour at each range of calcium concentrations. At extremely low concentrations (< l µM ) , to which legumes and herbs are more sensitive than Gramineae, the dominant process may involve ion exchange equilibria between calcium in the environment and in the cell walls or membranes. At higher concentrations (2.5–1000 µM), to which Gramineae are as sensitive as legumes and herbs, processes of absorption of calcium from solution and translocation to plant tops are probably dominant.

scholarly journals Calcium Deficiency Symptoms of Epipremnum aureum

HortScience ◽  
1991 ◽  
Vol 26 (5) ◽  
pp. 606
Author(s):  
Catherine S.M. Ku ◽  
David R. Hershey
Keyword(s):  
Calcium Deficiency ◽  
Deficiency Symptoms ◽  
Epipremnum Aureum

scholarly journals RESPONSES OF THE BEAN PLANT TO CALCIUM DEFICIENCY

1940 ◽  
Vol 15 (1) ◽  
pp. 1-21 ◽  
Author(s):  
Hugh Gauch
Keyword(s):  
Calcium Deficiency ◽  
Bean Plant

scholarly journals Studies on the effects of growing substrates and physical factors in sweet pepper forcing in context with the generation of calcium deficiency symptoms

2010 ◽  
Vol 16 (2) ◽  
Author(s):  
F. Lantos ◽  
Z. Pék ◽  
Z. Monostori ◽  
L. Helyes
Keyword(s):  
Environmental Factors ◽  
Root Zone ◽  
Sweet Pepper ◽  
Calcium Deficiency ◽  
Physical Factors ◽  
Deficiency Symptoms ◽  
Measurement Results ◽  
Blossom End Rot ◽  
Increasing Temperature

In the publications available for us, exact levels of physical factors and those of the growing technology determining Ca2+ deficiency are rarely detailed. Although the influencing role of the various environmental factors (humidity, light, temperature) is known, we had only little information about their exact values which could be presented for the growing practice. Sweet pepper varieties of the same type grown in various substrates responded to the environmental factors in different ways. Our results revealed that increasing temperature of the root zone had the most significant effect on the incidence of Ca2+ -deficient fruits. Their amount, however, gave different results depending on the growing substrate. In forced sweet pepper grown in soil the proportion of Ca2+ - deficient fruits were significantly lower compared to the plants grown on rockwool. Fruits derived from forcing on perlite, in container were damaged the least by the blossom end rot deficiency symptoms. Our experimental results and technological suggestions are based on measurement results of three years.

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