Differential Growth Responses of Fall Armyworm Larvae on Developing Sorghum Seeds Incorporated into a Meridic Diet

1984 ◽  
Vol 67 (3) ◽  
pp. 357 ◽  
Author(s):  
B. R. Wiseman ◽  
H. N. Pitre ◽  
L. Gourley ◽  
S. L. Fales
Keyword(s):  
Fall Armyworm ◽  
Growth Responses ◽  
Differential Growth ◽  
Meridic Diet

scholarly journals Differential Growth Responses of Wheat Seedlings to Elevated CO2

2018 ◽  
Vol 10 (3) ◽  
pp. 400-409 ◽  
Author(s):  
Hamid Reza ESHGHIZADEH ◽  
Morteza ZAHEDI ◽  
Samaneh MOHAMMADI
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Elevated Co2 ◽  
Co2 Concentration ◽  
Tolerance Index ◽  
Dry Matter Accumulation ◽  
Wheat Cultivars ◽  
Growth Responses ◽  
Differential Growth ◽  
Wheat Seedlings

Intraspecific variations in wheat growth responses to elevated CO2 was evaluated using 20 Iranian bread wheat (Triticum aestivum L.) cultivars. The plants were grown in the modified Hoagland nutrient solution at a greenhouse until 35 days of age using two levels of CO2 (~380 and 700 µmol mol–1). The shoot and root dry weights of the wheat cultivars exhibited average enhancements of 17% and 36%, respectively, under elevated CO2. This increase was associated with higher levels of chlorophyll a (25%), chlorophyll b (21%), carotenoid (30%), leaf area (54%) and plant height (49.9%). The leaf area (r = 0.69**), shoot N content (r = 0.62**), plant height (r = 0.60**) and root volume (r = 0.53*) were found to have important roles in dry matter accumulation of tested wheat cultivars under elevated CO2 concentration. However, responses to elevated CO2 were considerably cultivar-dependent. Based on the stress susceptibility index (SSI) and stress tolerance index (STI), the wheat cultivars exhibiting the best response to elevated CO2 content were ‘Sistan’, ‘Navid’, ‘Shiraz’, ‘Sepahan’ and ‘Bahar’, while the ones with poor responses were ‘Omid’, ‘Marun’, ‘Sorkhtokhm’ and ‘Tajan’. The findings from the present experiment showed significant variation among the Iranian wheat cultivars in terms of their responses to elevated air CO2, providing the opportunity to select the most efficient ones for breeding purposes.

scholarly journals Differential Growth Responses of Marine Phytoplankton to Herbicide Glyphosate

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0151633 ◽  
Author(s):  
Cong Wang ◽  
Xin Lin ◽  
Ling Li ◽  
Senjie Lin
Keyword(s):  
Marine Phytoplankton ◽  
Growth Responses ◽  
Differential Growth ◽  
Herbicide Glyphosate

scholarly journals Differential Growth Responses to Water Balance of Coexisting Deciduous Tree Species Are Linked to Wood Density in a Bolivian Tropical Dry Forest

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e73855 ◽  
Author(s):  
Hooz A. Mendivelso ◽  
J. Julio Camarero ◽  
Oriol Royo Obregón ◽  
Emilia Gutiérrez ◽  
Marisol Toledo
Keyword(s):  
Water Balance ◽  
Wood Density ◽  
Tree Species ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Deciduous Tree ◽  
Growth Responses ◽  
Differential Growth

scholarly journals Differential Growth Responses of Apple Species to Chilling and Root Pruning

1990 ◽  
Vol 115 (2) ◽  
pp. 196-202 ◽  
Author(s):  
Michael A. Arnold ◽  
Eric Young
Keyword(s):  
Root Growth ◽  
Shoot Growth ◽  
Root Pruning ◽  
Growth Responses ◽  
Differential Growth ◽  
Chilling Requirements ◽  
Root And Shoot Growth ◽  
Bare Root ◽  
Chilling Hours ◽  
Root Types

Malus dometica Borkh., M. anis, M. prunifolia Borkh., M. × robusta Rehd., M. antonovka, M. borwinkw, and M. ranetka bare-root seedlings were chilled at 5C for 0, 400, 800, 1200, or 1600 hours. After chilling treatments, one-half of the seedlings were root-pruned and all seedlings were placed in a greenhouse for 15 days. Quantitative differences between species in the timing and magnitude of new root and shoot growth responses to chilling were observed. Root pruning decreased and delayed the production of roots <0.6 mm in diameter in response to chilling, while the production of larger roots was less affected. Regeneration of both root types differed among species. For new large (≥ 0.6 mm in diameter) root growth criteria, interactions between chilling hours and species were apparent. Chilling requirements and growing degree hour requirements for vegetative budbreak of each species were estimated.

Vesicular-arbuscular mycorrhiza in semi-arid pastures of south-west Queensland and their effect on growth responses to phosphorus fertilizers by grasses

1992 ◽  
Vol 43 (5) ◽  
pp. 1143 ◽  
Author(s):  
RD Armstrong ◽  
KR Helyar ◽  
EK Christie
Keyword(s):  
Growth Response ◽  
Grass Species ◽  
Most Probable Number ◽  
Growth Responses ◽  
Differential Growth ◽  
Probable Number ◽  
Vesicular Arbuscular ◽  
Phosphorus Fertilizers ◽  
Native Pasture ◽  
P Fertilizer

Field and controlled environment studies were undertaken to determine the seasonal variation in vesicular-arbuscular mycorrhizal (VAM) propagules under different types of vegetation in the mulga (Acacia aneura) shrublands of south-western Queensland and how inoculation with VAM affects the growth and response to phosphorus fertilizers of several grasses common to this region. A most probable number (MPN) technique was used to estimate the number of viable VAM propagules under mulga shrubland and native pasture. There was a pronounced rise in MPN at a native pasture site from June to November, peaking at 1 propagule/g soil, before declining between November and May to non detectable concentrations. In the mulga shrubland site, MPN remained very low (less than 0.2 propagules/g soil) throughout the study. Pasture species in the field were screened for VAM infection in both winter and summer. Only three of the 14 species sampled were infected with VAM in winter (June) after a long drought. In contrast, 10 of the 14 species sampled in December possessed VAM-infected roots. A pot experiment was conducted to examine the influence of VAM inoculation on growth and the response to phosphate fertilizer of several important pasture grasses in pastures derived from mulga shrublands. The treatments comprised a factorial combination of inoculation or non-inoculation with VAM, four grass species (Aristida armata, Cenchms ciliaris cv. USA, Digitaria ammophilla, and Thyridolepis mitchelliana), and four rates of P fertilizer designed to range over very deficient to non-limiting for each species. All species except D. ammophilla produced growth responses to VAM inoculation. Though C. ciliaris and T. mitchelliana responded to VAM inoculation only in soil unamended with P fertilizer, A. amata showed growth responses across all P rates examined, suggesting some factor other than P was limiting this species. The growth response of the grasses to VAM inoculation was poorly correlated with the percentage of root infected with VAM. D. ammophilla had the highest levels of root infection (32%) despite producing no growth response to VAM. In contrast, T. mitchelliana had less than 2% of the root infected with VAM. All species had thin fibrous roots with long (0.35-0.47 mm), frequent root hairs. The differential growth responses to VAM inoculation of A. armata compared with the other grasses may provide a management strategy to control Aristida ingress into pastures established from mulga shrublands.

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