Effects of selenium content in green parts of plants on the amount of ATP and ascorbate–glutathione cycle enzyme activity at various growth stages of wheat and oilseed rape

2008 ◽  
Vol 165 (10) ◽  
pp. 1011-1022 ◽  
Author(s):  
Krzysztof Kąklewski ◽  
Janina Nowak ◽  
Marek Ligocki
Keyword(s):  
Enzyme Activity ◽  
Oilseed Rape ◽  
Growth Stages ◽  
Selenium Content ◽  
Cycle Enzyme ◽  
Glutathione Cycle

Absorption, Distribution, and Translocation of Nitrogen at Growth Stages in Oilseed Rape Plant

2010 ◽  
Vol 36 (2) ◽  
pp. 321-326
Author(s):  
Zhen-Hua ZHANG ◽  
Hai-Xing SONG ◽  
Qiang LIU ◽  
Xiang-Min RONG ◽  
Gui-Xian XIE ◽  
...  
Keyword(s):  
Oilseed Rape ◽  
Growth Stages ◽  
Rape Plant

scholarly journals RNAi efficacy is enhanced by chronic dsRNA feeding in pollen beetle

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Jonathan Willow ◽  
Liina Soonvald ◽  
Silva Sulg ◽  
Riina Kaasik ◽  
Ana Isabel Silva ◽  
...  
Keyword(s):  
Rna Interference ◽  
Pest Management ◽  
Oilseed Rape ◽  
Growth Stages ◽  
Short Term ◽  
Pollen Beetle ◽  
Brassicogethes Aeneus ◽  
Crop Growth Stages ◽  
Insecticidal Compounds ◽  
Significant Mortality

AbstractDouble-stranded RNAs (dsRNAs) represent a promising class of biosafe insecticidal compounds. We examined the ability to induce RNA interference (RNAi) in the pollen beetle Brassicogethes aeneus via anther feeding, and compared short-term (3 d) to chronic (17 d) feeding of various concentrations of dsRNA targeting αCOP (dsαCOP). In short-term dsαCOP feeding, only the highest concentration resulted in significant reductions in B. aeneus survival; whereas in chronic dsαCOP feeding, all three concentrations resulted in significant mortality. Chronic dsαCOP feeding also resulted in significantly greater mortality compared to short-term feeding of equivalent dsαCOP concentrations. Our results have implications for the economics and development of dsRNA spray approaches for managing crop pests, in that multiple lower-concentration dsRNA spray treatments across crop growth stages may result in greater pest management efficacy, compared to single treatments using higher dsRNA concentrations. Furthermore, our results highlight the need for research into the development of RNAi cultivars for oilseed rape protection, given the enhanced RNAi efficacy resulting from chronic, compared to short-term, dsRNA feeding in B. aeneus.

scholarly journals Effect of moisture stress on leaf protein, proline, peroxidise activity and yield in released and pre-released genotypes of groundnut (Arachis hypogaea L.)

2020 ◽  
Vol 16 (2) ◽  
pp. 260-264
Author(s):  
H.Y. Patil ◽  
Pooja ◽  
V.P. Chimmad
Keyword(s):  
Enzyme Activity ◽  
Co2 Concentration ◽  
Moisture Stress ◽  
Leaf Protein ◽  
Growth Stages ◽  
Arachis Hypogaea L ◽  
Moisture Deficit ◽  
Peroxidase Enzyme ◽  
Rain Fall ◽  
The Impact

The performance of crops need to be assessed for their production under erratic rain fall pattern, increased temperatures, and enhanced atmospheric CO2 concentration. In the present study groundnut was chosen as test crop and selected genotypes [four released (GPBD-4, G2-52, Dh-86 and TMV-2) and four pre-released (Dh-245, Dh-232, Dh-256 and Dh-257)] were studied to quantify the impact of moisture deficit stress at critical growth stages i.e., 40 to 80 DAS and 80 DAS to harvest. Leaf protein and proline increases in tolerant genotypes at higher moisture stress levels than susceptible genotypes as they acts as osmolytes and maintains the turgidity of the cell and hence, checks the water loss and peroxidase enzyme activity which in turn scavenges ROS produced due to stress as a result there was reduction in yield. The genotypes, GPBD-4, Dh-257 and Dh-256 recorded higher per cent increase in leaf soluble protein, leaf proline and peroxidase enzyme activity at all the stages. Increase was higher at 80 DAS to harvest stressed plants than 40 to 80 DAS stressed plants.

Methyl jasmonate alleviates arsenic-induced oxidative damage and modulates the ascorbate–glutathione cycle in oilseed rape roots

2017 ◽  
Vol 84 (1) ◽  
pp. 135-148 ◽  
Author(s):  
Muhammad A. Farooq ◽  
Faisal Islam ◽  
Chong Yang ◽  
Aamir Nawaz ◽  
Habib-ur-Rehman Athar ◽  
...  
Keyword(s):  
Oxidative Damage ◽  
Methyl Jasmonate ◽  
Oilseed Rape ◽  
Glutathione Cycle

scholarly journals In-Field Observation of Root Growth and Nitrogen Uptake Efficiency of Winter Oilseed Rape

Agronomy ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 105
Author(s):  
Julien Louvieaux ◽  
Antoine Leclercq ◽  
Loïc Haelterman ◽  
Christian Hermans
Keyword(s):  
Root Growth ◽  
Oilseed Rape ◽  
Root Development ◽  
Nitrogen Uptake ◽  
Root Morphology ◽  
Growth Stages ◽  
Winter Oilseed Rape ◽  
Nitrogen Uptake Efficiency ◽  
Uptake Efficiency ◽  
N Concentration

Field trials were conducted with two nitrogen applications (0 or 240 kg N ha−1) and three modern cultivars of winter oilseed rape (Brassica napus L.) previously selected from a root morphology screen at a young developmental stage. The purpose is to examine the relationship between root morphology and Nitrogen Uptake Efficiency (NUpE) and to test the predictiveness of some canopy optical indices for seed quality and yield. A tube-rhizotron system was used to incorporate below-ground root growth information. Practically, clear tubes of one meter in length were installed in soil at an angle of 45°. The root development was followed with a camera at key growth stages in autumn (leaf development) and spring (stem elongation and flowering). Autumn was a critical time window to observe the root development, and exploration in deeper horizons (36–48 cm) was faster without any fertilization treatment. Analysis of the rhizotron images was challenging and it was not possible to clearly discriminate between cultivars. Canopy reflectance and leaf optical indices were measured with proximal sensors. The Normalized Difference Vegetation Index (NDVI) was a positive indicator of biomass and seed yield while the Nitrogen Balance Index (NBI) was a positive indicator of above-ground biomass N concentration at flowering and seed N concentration at harvest.

Light intensity and the growth of Eucalyptus seedlings. I. Ontogenetic variation in E. fastigata

1970 ◽  
Vol 18 (1) ◽  
pp. 29 ◽  
Author(s):  
RJ Cameron
Keyword(s):  
Enzyme Activity ◽  
Light Intensity ◽  
Morphological Characteristics ◽  
Anatomical Structure ◽  
Growth Stages ◽  
Ontogenetic Variation ◽  
Light Climate ◽  
Low Light ◽  
Adult Leaf ◽  
Abundance And Distribution

Morphological and physiological variation associated with ontogenetic development is described for E. fastigata and their significance in ecology is discussed. Juvenile, intermediate, and adult leaf stages are identified. These differ in such morphological characteristics as leaf orientation, shape, thickness, chlorophyll content, and anatomical structure (including size, abundance, and distribution of stomata), all details which, in juvenile and intermediate leaves at least, are modified by the light climate under which the plants are grown. There are also significant physiological differences between juvenile and intermediate growth stages, particularly as concern apical dominance and rates of apparent photosynthesis, and modification of these by light climate. A comparison of juvenile and intermediate leaves shows that the former possess a number of features which should permit them to function better in conditions of low light intensity but, contrary to such expectations, rates of apparent photosynthesis are higher in intermediate leaves. That this is so is, it is suggested, due to differences in photosynthetic enzyme activity, an hypothesis which has not been investigated.

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