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Full-Text Articles in Life Sciences
Carbon Dioxide Assimilation Efficiency Of Maize Leaves Under Nitrogen Stress At Different Stages Of Plant Development, John Settimi, Jerry Maranville
Carbon Dioxide Assimilation Efficiency Of Maize Leaves Under Nitrogen Stress At Different Stages Of Plant Development, John Settimi, Jerry Maranville
John R. Settimi
Sub-optimal nitrogen (N) affects the N-rich carbon dioxide (CO2) assimilation enzymes which can limit maize (Zea mays) production. The status of the carboxylation system is closely correlated to the Assimilation Efficiency Index (AEI) which is the initial slope of the CO2 assimilation rate versus intercellular leaf CO2 concentrations. Experiments were undertaken to ascertain the effect of soil N nutrition on the AEI, determine genotypic variability for AEI under N-deficiency, determine how leaf and plant development affect treatment differences, and examine correlations between the AEI and plant development. Studies were conducted in the field and greenhouse on five maize genotypes on …
Selection For Resistance And Tolerance To Oat Mosaic Virus And Oat Golden Stripe Virus In Hexaploid Oats, Scott L. Walker, Steven Leath, J. Paul Murphy, Steven A. Lommel
Selection For Resistance And Tolerance To Oat Mosaic Virus And Oat Golden Stripe Virus In Hexaploid Oats, Scott L. Walker, Steven Leath, J. Paul Murphy, Steven A. Lommel
Steven Leath
Fractal Analysis For Morphological Description Of Corn Roots Under Nitrogen Stress, John Settimi, Bahman Eghbal, Jerry Maranville, Anne Parkhurst
Fractal Analysis For Morphological Description Of Corn Roots Under Nitrogen Stress, John Settimi, Bahman Eghbal, Jerry Maranville, Anne Parkhurst
John R. Settimi
A means of quantification of plant root branching, specifically under stress, is of importance for evaluating the contribution of plant roots to water and nutrient uptake and subsequently plant growth. An experiment was conducted to describe the morphology of corn (Zea mays L.) root systems using fractal analysis and also to determine if a roots fractal dimension (D) is altered by N stress. Corn genotypes (B73 ✕ LHI05 and N74 ✕ Mo17) were planted in peg boxes, 1.2 m long, 1.2 m deep, and 0.05 m wide filled with 20:80 soil to sand mixture and were grown with N rates …
Food Ingredients: The Lure Of Convenience Amplifies Sales, Jack Marr
Food Ingredients: The Lure Of Convenience Amplifies Sales, Jack Marr
Jack Marr
Growth And Reproductive Performance Of Small Ruminants Under Integrated Livestock Oil Palm Production System, Ahmad Salihin Hj Baba, Azillah A., Mukherjee T. K., Abdullah R. B.
Growth And Reproductive Performance Of Small Ruminants Under Integrated Livestock Oil Palm Production System, Ahmad Salihin Hj Baba, Azillah A., Mukherjee T. K., Abdullah R. B.
Ahmad Salihin Hj Baba
The effects of supplementation with mixed fodder or concentrate were investigated on the performance of a) growth of male lambs;md kids grazing extensively under oil palm trees and b) reproduction of ewes and goats stall-fed with native herbage. Supplemented kids and lambs had higher average daily weight gain than controls but the effect was only significant for those which received concentrate (p < 0.05). Final body weight was only significantly different from controls for lambs supplemented with concentrate (p < 0.05). The ages at puberty, first mating, first conception and first kidding of supplemented goats were about 110 days earlier than those for controls (p < 0.05 or better). Supplemented goats had first mating and conceived at lower body weights (p < 0.01) than those in control groups. Different feeding regimes had no effects (p > 0.05) on the reproductive performance of ewes apart fi om highest body weight of first lambing in animals supplemented with concentrate (p < 0.05). Native herbage available under oil palm trees of 5 years old was sufficient for growth …