Redistribution of Nitrogen in Young Bush Bean Plants (Phaseolus vulgaris L.)

A solution containing 0.5 p.p.m. of atrazine, simazine, igran, or GS-14254 with 0.2% triton-B 1956 was applied to the foliage of 11-day-old seedlings of bush beans, Phaseolus vulgaris L. cultivar Tender-green, growing on vermiculite in a controlled environment. The activities of nitrate reductase, glutamic-pyruvic transaminase, α-amylase, starch phosphorylase, and adenosine triphosphatase were determined 5,10, and 20 days after treatment. In general, the activity of each of the five enzymes was stimulated by the treatment. The results suggest that protein increase following the application of.s-triazines to bean plants may stem in part from an enhanced rate of amino acid formation resulting from the induced increment in nitrate reductase and transaminase activity. The application of these chemicals also creates a metabolic condition favorable for greater use of carbohydrates needed for nitrate reduction and protein synthesis, and as a source of organic acid synthesis.

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Soil Application of Effective Microorganisms (EM) Maintains Leaf Photosynthetic Efficiency, Increases Seed Yield and Quality Traits of Bean (Phaseolus vulgaris L.) Plants Grown on Different Substrates

International Journal of Molecular Sciences ◽

10.3390/ijms20092327 ◽

2019 ◽

Vol 20 (9) ◽

pp. 2327 ◽

Cited By ~ 3

Author(s):

Marcello Iriti ◽

Alessio Scarafoni ◽

Simon Pierce ◽

Giulia Castorina ◽

Sara Vitalini

Keyword(s):

Phaseolus Vulgaris ◽

Photosystem Ii ◽

Sandy Soil ◽

Photosynthetic Efficiency ◽

Quality Traits ◽

Phaseolus Vulgaris L ◽

Effective Microorganisms ◽

Yield And Quality ◽

Bean Plants

EM (effective microorganisms) is a biofertilizer consisting of a mixed culture of potentially beneficial microorganisms. In this study, we investigated the effects of EM treatment on leaf in vivo chlorophyll a fluorescence of photosystem II (PSII), yield, and macronutrient content of bean plants grown on different substrates (nutrient rich substrate vs. nutrient poor sandy soil) in controlled environmental conditions (pot experiment in greenhouse). EM-treated plants maintained optimum leaf photosynthetic efficiency two weeks longer than the control plants, and increased yield independent of substrate. The levels of seed nutritionally-relevant molecules (proteins, lipids, and starch) were only slightly modified, apart from the protein content, which increased in plants grown in sandy soil. Although EM can be considered a promising and environmentally friendly technology for sustainable agriculture, more studies are needed to elucidate the mechanism(s) of action of EM, as well as its efficacy under open field conditions.

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Investigations on the pathogenicity of Helminthosporium sorokinianum Sacc. in relation to Phaseolus vulgaris L.

Acta Mycologica ◽

10.5586/am.1974.009 ◽

2014 ◽

Vol 10 (2) ◽

pp. 283-293

Author(s):

Barbara Łacicowa ◽

Zofia Machowicz

Keyword(s):

Phaseolus Vulgaris ◽

Root System ◽

Field Experiments ◽

Phaseolus Vulgaris L ◽

Bean Plants ◽

Before And After

The results obtained in pot and field experiments have shown that <i>Helminthosporium sorokinianum</i> is able to infect bean plants. The cotyledons and roots of shoots during the first three weeks of growth are attacked the most frequently. Dark brown spots occur on the above-mentined organs. The infection of roots and cotyledonsof shoots is responsible for gangrene both before and after germination. Infected plants which remain alive only show symptoms of infection in the root system. The infection of roots by <i>H. sorokinianum</i> in older plants is detromental to growth and causes a decrease in the vield obtained from bean plants.

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Studies on phytocides. I. Diurnal variation in effectiveness of 'methoxone'

Australian Journal of Agricultural Research ◽

10.1071/ar9500148 ◽

1950 ◽

Vol 1 (2) ◽

pp. 148 ◽

Cited By ~ 1

Author(s):

CG Greenham

Keyword(s):

Phaseolus Vulgaris ◽

Diurnal Variation ◽

Phaseolus Vulgaris L ◽

Bean Plants ◽

Spray Applications ◽

Chondrilla Juncea

As determined by the length for which roots were killed, there was no diurnal variation in the effectiveness on skeleton weed (Chondrilla juncea L.) of spray applications of 'Methoxone' at two-hourly intervals over a period of 24 hours. As determined by reduction in growth above the primary leaves, there was a well-marked diurnal variation in the effectiveness on bean plants (Phaseolus vulgaris L.) of drop applications of 'Methoxone.'

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