Contrasting patterns of accumulation, partitioning, and remobilization of biomass and phosphorus in a maize cultivar

1990 ◽

Vol 48 (3) ◽

pp. 674-675

Author(s):

P.T. Nguyen ◽

C. Uphoff ◽

C.L. Stinemetz

Keyword(s):

Calcium Binding ◽

Calcium Transport ◽

Primary Role ◽

Immunogold Localization ◽

Root Tips ◽

Electrical Currents ◽

Considerable Evidence ◽

Maize Cultivar ◽

Gravity Response ◽

Induced Changes

Considerable evidence suggest that the calcium-binding protein calmodulin (CaM) may mediate calcium action and/or transport important in the gravity response of plants. Calmodulin is present in both shoots and roots and is capable of regulating calcium transport in plant vesicles. In roots calmodulin is concentrated in the tip, the gravisensing region of the root; and is reported to be closely associated with amyloplasts, organelles suggested to play a primary role in gravi-perception. Inhibitors of CaM such as chlorpromazine, calmidazolium, and compound 48/80 interfere with the gravitropic response of both snoots and roots. The magnitude of the inhibition corresponded well with the extent to which the drug binds to endogenous CaM. Compound 48/80 and calmidazolium block gravi-induced changes in electrical currents across root tips, a phenomenon thought to be associated with the sensing of the gravity stimulus.In this study, we have investigated the subcellular distribution of CaM in graviresponsive and non-graviresponsive root caps of the maize cultivar Merit.

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Nitrate‐Reductase Activity and Grain Yield of Maize Cultivar Hybrids 1

Crop Science ◽

10.2135/cropsci1978.0011183x001800040039x ◽

1978 ◽

Vol 18 (4) ◽

pp. 680-682 ◽

Cited By ~ 6

Author(s):

M. A. B. Fakorede ◽

J. J. Mock

Keyword(s):

Nitrate Reductase ◽

Grain Yield ◽

Nitrate Reductase Activity ◽

Reductase Activity ◽

Maize Cultivar

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Effect of Integrated Nutrient Management Practices on Growth and Development of Hybrid Maize Cultivar HQPM 1 in Mid-Hills of Meghalaya

Journal of AgriSearch ◽

10.21921/jas.v4i03.9020 ◽

2017 ◽

Vol 4 (03) ◽

Author(s):

SAMBORLANG K. WANNIANG ◽

A. K. SINGH

Keyword(s):

Dry Matter ◽

Management Practices ◽

Nutrient Management ◽

Dry Matter Accumulation ◽

Integrated Nutrient Management ◽

Graduate Studies ◽

Green Manuring ◽

Maize Cultivar ◽

Significant Difference ◽

Hybrid Maize

A field experiment was conducted during kharif 2011 on experimental farm of the College of Post Graduate Studies (CAU–Imphal), Umiam (Meghalaya) to evaluate the effect of integration of green manuring, FYM and fertilizers as integrated nutrient management (INM) practices on growth and developmental behaviour of quality protein maize cultivar QPM 1. The data revealed that comparatively higher amount of primary nutrients were added in green manured maize plots in comparison to non green manured treatments. Green manuring also left a positive response on plant height, CGR, RGR leaf area, and dry matter accumulation in plants though the difference between green manured and non-green manured treatments was at par. Treatments 75 % RDF + 5 t FYM ha-1, 50 % RDF + 7.5 t FYM ha-1, 100 % RDF ha-1 and 75 % RDF + 2.5 t FYM ha-1 recorded significantly higher values of all the above said growth parameters over 50 % RDF + 5 t FYM ha-1 and control treatments. At all stages of observations, the maximum dry matter was associated with RDF (recommended doses of fertilizers) which was at par with 75 % RDF + 5 t FYM ha-1, but significantly higher over the plant dry weight recorded from all remaining treatments. A Significant difference in CGR at 30 – 60 and 60 – 90 DAS stage and in RGR at 90 DAS - harvest stage was observed due to various combinations of recommended dose of fertilizer with different doses of FYM. Number of days taken to attain the stages of 50% tasselling, silking and maturity did not differ significantly due to green manuring. However, treatment 75 % RDF + 5 t FYM ha-1 took significantly lesser number of days for these stages than other treatment combinations. The superiority of the treatment 75 % RDF + 5 t FYM ha-1 indicated a possibility of substituting 25% of RDF with 5 t FYM ha-1 without any loss in dry matter accumulation in plants of the quality protein hybrid maize in mid-hill ecosystems of Meghalaya.

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Landrace Maize Varieties Used as Phytoremediation of Contaminated Soil with 2,4-D + Picloram

Journal of Agricultural Studies ◽

10.5296/jas.v8i4.17480 ◽

2020 ◽

Vol 8 (4) ◽

pp. 302

Author(s):

Adriano Maltezo da Rocha ◽

Oscar Mitsuo Yamashita ◽

Paulo Cesar Laurindo Silva ◽

Marco Antonio Camillo de Carvalho ◽

Aureane Cristina Teixeira Ferreira Cândido ◽

...

Keyword(s):

Contaminated Soil ◽

Production System ◽

Dry Mass ◽

Soil Samples ◽

Evaluation Period ◽

Maize Cultivar ◽

Herbicide Residue ◽

Maize Varieties ◽

Hybrid Maize

The use of herbicides such as 2,4-D + picloram in livestock areas can contaminate and hinder the use of the production system for subsequent crops of other crops. The objective of the research was to evaluate the ability of landrace maize varieties to reduce contamination of soil treated with 2,4-D + picloram, simulating existing conditions in the Amazon Biome. The experiment consisted of 6 phytoremediation treatments (4 landrace maize varieties, 1 hybrid maize cultivar and 1 control without cultivation), 2 herbicide conditions (with and without) and 3 evaluation periods (28, 56 and 84 days). The soil was contaminated and the maize was subsequently cultivated under the herbicide conditions mentioned above. After each evaluation period, soil samples were collected, which were used to mount bioassays by growing cucumber (plants sensitive to the herbicide). Emergence, aerial dry mass and root dry mass were evaluated. All variables were affected by the herbicide residue. However, the reduction in herbicide persistence in each evaluation period was notable, resulting in the normal reestablishment of bioindicator seedlings, especially in the last evaluation at 84 days. The samples obtained in the soil cultivated with the varieties CR purple and CR white showed the best conditions for the development of cucumber, demonstrating the potential to be studied in phytoremediation programs.

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