Increased transpiration is correlated with reduced boron deficiency symptoms in the maize tassel-less1 mutant

2018 ◽  
Vol 163 (3) ◽  
pp. 344-355 ◽  
Author(s):  
Michaela S. Matthes ◽  
Janlo M. Robil ◽  
Thu Tran ◽  
Ashten Kimble ◽  
Paula McSteen
Keyword(s):  
Boron Deficiency ◽  
Deficiency Symptoms ◽  
Maize Tassel

Boron requirement and deficiency symptoms of fenugreek (Trigonella foenum–graecum) as shown in a water culture experiment with inoculation of Rhizobium

1980 ◽  
Vol 94 (2) ◽  
pp. 455-460 ◽  
Author(s):  
P. Mølgaard ◽  
R. Hardman
Keyword(s):  
Rhizobium Meliloti ◽  
Early Stage ◽  
Field Trials ◽  
Boron Deficiency ◽  
Trigonella Foenum Graecum ◽  
Deficiency Symptoms ◽  
High Calcium ◽  
High Boron ◽  
Whole Plants ◽  
Low Nitrogen

SummaryThis experiment was made to determine the possible reason for deficiency symptoms seen on fenugreek (Trigonella foenum-graecum) in field trials during the dry summer of 1976. Using rockwool cubes for root support, it was shown that symptoms seen in the field plants resulted from boron deficiency.The symptoms of boron deficiency in fenugreek are described and illustrated. The main symptoms were failure offloweringor fertilization, decreased apical growth, small crisped leaves in a terminal rosette and a gradual yellowing of the lower leaves. In combination with low nitrogen, the boron-deficient plants had yellow, succulent leaves at a very early stage. High calcium and high nitrogen increased the demand for boron.Inoculation with Rhizobium meliloti of plants with a low nitrogen supply was performed with success. The bacteria formed healthy, pink nodules on the roots inside the rockwool cubes.The lowest content of boron in whole plants showing boron deficiency symptoms (no pods formed) was 13 μg/g and in this respect fenugreek is very similar to lucerne (Medicago sativa), a plant known to have a high boron requirement. Fenugreek has a high tolerance of excess boron.

Abnormalities in vegetative and floral organs of Cola nitida caused by boron deficiency

1972 ◽  
Vol 50 (2) ◽  
pp. 381-383 ◽  
Author(s):  
V. J. Jacob ◽  
N. E. Egbe ◽  
G. E. Okoloko
Keyword(s):  
Fruit Development ◽  
Growth And Development ◽  
Boron Content ◽  
Boron Deficiency ◽  
Parthenocarpic Fruit ◽  
Deficiency Symptoms ◽  
Fruit Setting ◽  
Lateral Branches ◽  
Cola Nitida ◽  
Female Flowers

Abnormalities in growth and development in C. nitida (Vent.) Schott and Endl. caused by boron deficiency are described. These include dieback of terminal shoots and the subsequent simultaneous development of many lateral branches, malformation of leaves, profuse flowering, increase in flower size, reduced fruit setting, parthenocarpic fruit development, and the preponderance of female flowers in the inflorescences. Visible deficiency symptoms did not appear when the boron content of the leaves was 15 ppm or more.

scholarly journals Physiology and Biochemistry of the Tobacco Plant. 2. Physiological Malfunctions: Mineral Nutrients - Physiologie und Biochemie der Tabakpflanze: 2. PhysiologischeStörungen: Mineralstoffe

1989 ◽  
Vol 14 (4) ◽  
pp. 211-236
Author(s):  
PE Barney ◽  
LP Bush ◽  
TC Tso
Keyword(s):  
Mineral Nutrients ◽  
Boron Deficiency ◽  
Leaf Quality ◽  
Tobacco Leaf ◽  
Deficiency Symptoms ◽  
Terminal Bud ◽  
Reduced Nitrogen ◽  
Burn Rate ◽  
Iron Manganese ◽  
Nitrogen Phosphorus

AbstractQuality tobacco leaf comes from plants grown with balanced mineral nutrition. The “structural nutrients” (carbon, hydrogen and oxygen) are approximately 90 % of the dry weight of cured leaf but are of little economic concern. The macronutrients (nitrogen, phosphorus, potassium, calcium, magnesium and sulfur) and the micronutrients (boron, chlorine, copper, iron, manganese, molybdenum and zinc) are of great economic concern and adequate amounts in the soil are essential for production of quality tobacco leaf. Nitrogen, phosphorus, potassium and magnesium are mobile within the plant and deficiency symptoms are observed first in the lower leaves and later in the upper leaves. Deficiency symptoms of the immobile nutrients calcium, boron, manganese, sulfur and iron are observed first on the upper leaves or terminal bud. Of all the mineral nutrients nitrogen has the greatest effect on shoot and root weight. As available nitrogen increases leaf nicotine increases and reducing sugars decrease; thus the sugar:nicotine ratio decreases dramatically. There is a positive relationship between amount of reduced nitrogen and reduced sulfur in the plant and this interaction is important as most of the reduced nitrogen and sulfur are utilized in protein synthesis. Total uptake of potassium is greater than for any other mineral. Because of the immobility of calcium and boron, deficiency of these nutrients results in physiological decapitation (topping) and consequently increased nicotine content of leaves. Excessive amounts of nutrients can also produce some problems. Excessive nitrogen increases yield but it also increases the incidence of disease, delays flowering and leaf ripening, and lowers leaf quality. Excessive addition of lime causes a basic soil pH which increases disease incidence and limits availability of phosphorus, iron, manganese and zinc. Excessive chlorine increases the hygroscopic property of the leaf and reduces burn rate. Soil applied magnesium oxide may reduce potassium absorption and therefore reduce burn rate.

scholarly journals Effect of borax application on young coconut palms

CORD ◽  
2005 ◽  
Vol 21 (02) ◽  
pp. 34
Author(s):  
P.G. Kamalakshiamma ◽  
M. Shanavas ◽  
D. Prema ◽  
Jacob Mathew
Keyword(s):  
Boron Content ◽  
Growth Parameters ◽  
Boron Deficiency ◽  
Leaf Production ◽  
Stunted Growth ◽  
Deficiency Symptoms ◽  
Leaf Tissues ◽  
Plantation Crops ◽  
Different Levels ◽  
Different Doses

There is increasing incidence of boron deficiency in coconut palms in the root (wilt) affected tract in the southern districts of Kerala, India. An earlier survey in this tract indicated that 19-25% of the palms had boron deficiency symptoms. The symptoms manifested due to boron deficiency in coconut palms include malformations in leaves as well as in the nuts resulting in stunted growth and low productivity. A field experiment was conducted at Central Plantation Crops Research Institute, Kayamkulam to study the effect of different doses of boron on deficiency symptoms and the nutrition of coconut seedlings. The results revealed that the seedlings which had boron deficiency symptoms showed recovery with the boron application. Among the different levels of borax (Na2B4O7.10H2O) tried on coconut seedlings, application of 300 g borax per seedling per year in two equal splits was found effective to achieve recovery and to improve the growth of the young seedlings. The seedlings treated with borax showed improvement in growth parameters such as girth at collar, annual leaf production and total functional leaves and boron content in leaf tissues.

scholarly journals Fall foliar sprays prevent boron-deficiency symptoms in grapes

2006 ◽  
Vol 60 (2) ◽  
pp. 100-103 ◽  
Author(s):  
Robert H. Beede ◽  
L. Peter Christensen ◽  
William L. Peacock
Keyword(s):  
Boron Deficiency ◽  
Deficiency Symptoms ◽  
Foliar Sprays
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