scholarly journals Testing the effect of dietary carotenoids on larval survival, growth and development in the critically endangered southern corroboree frog

Zoo Biology ◽  
2017 ◽  
Vol 36 (2) ◽  
pp. 161-169 ◽  
Author(s):  
Phillip G. Byrne ◽  
Aimee J. Silla
Keyword(s):  
Growth And Development ◽  
Larval Survival ◽  
Critically Endangered

scholarly journals Endophyteinfected meadow fescue and loline alkaloids affect Argentine stem weevil larvae

2009 ◽  
Vol 62 ◽  
pp. 19-27 ◽  
Author(s):  
A.J. Popay ◽  
B.A. Tapper ◽  
C. Podmore
Keyword(s):  
Growth And Development ◽  
Artificial Diet ◽  
Larval Survival ◽  
Lower Percentage ◽  
Meadow Fescue ◽  
Loline Alkaloids

In a meadow fescue plant assay a lower percentage of tillers on endophyteinfected (E) than endophytefree (E) plants on which eggs had been laid were damaged by Argentine stem weevil (ASW) larvae There were indications of endophytemediated toxicity to young larvae The percentage of damaged tillers on E and E plants without ASW eggs was similar when they were planted alongside a plant with eggs but severity of damage was less on E plants In an artificial diet experiment eggs took 23 days longer to hatch on an alkaloidfree diet than on diets containing either of two loline alkaloids produced by E meadow fescue Growth and development of larvae was reduced by up to 36 at two higher concentrations of Nformyl loline (NFL) relative to the lowest concentration and to a lesser extent by Nacetyl norloline Larval survival declined with increasing concentrations of both alkaloids with the highest mortality occurring at the two higher concentrations of NFL

Influence of tannic acid and Cry1Ac toxin ofBacillus thuringiensison larval survival, growth, and development ofHelicoverpa armigera

2009 ◽  
Vol 132 (1) ◽  
pp. 50-58 ◽  
Author(s):  
Xiumin Guan ◽  
Xiaoxia Liu ◽  
Zengquan Lu ◽  
Zhangwu Zhao ◽  
Qingwen Zhang ◽  
...  
Keyword(s):  
Tannic Acid ◽  
Growth And Development ◽  
Larval Survival ◽  
Cry1ac Toxin

scholarly journals Warmer temperature and provision of natural substrate enable earlier metamorphosis in the critically endangered Baw Baw frog

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Deon J Gilbert ◽  
Michael J L Magrath ◽  
Phillip G Byrne
Keyword(s):  
Body Size ◽  
Water Temperature ◽  
Food Availability ◽  
Growth And Development ◽  
Critically Endangered ◽  
Interactive Effects ◽  
Amphibian Conservation ◽  
Phenotypic Change ◽  
Treatment Groups ◽  
Size At Metamorphosis

Abstract Temperature and food availability are known to independently trigger phenotypic change in ectotherms, but the interactive effects between these factors have rarely been considered. This study investigates the independent and interactive effects of water temperature and food availability on larval growth and development of the critically endangered Baw Baw frog, Philoria frosti. Larvae were reared at low (12°C) or high (17°C) water temperature in the absence or presence of substrate that controlled food availability, and body size and time to metamorphosis were quantified. Growth and development of larvae was influenced by the individual effects of temperature and food availability; time to metamorphosis was shorter in warm water treatment groups and in the presence of substrate and increased food. Unexpectedly, however, water temperature and food availability did not have an interactive effect on either time to metamorphose or body size at metamorphosis. Under all treatment groups, metamorphic onset occurred once a developmental size threshold was reached, indicating that growth rate and body size are key factors controlling the metamorphic process in Baw Baw frogs (consistent with the Wilbur–Collins model for ectotherm development). From an applied perspective, our findings have implications for amphibian conservation because they indicate that simple manipulations of temperature and food availability can be used to increase the rate of frog production in conservation breeding programs.

An ultrastructural study of vegetative incompatibility in plants

1978 ◽  
Vol 36 (2) ◽  
pp. 436-437
Author(s):  
Randy Moore
Keyword(s):  
Ultrastructural Study ◽  
Cell Walls ◽  
Growth And Development ◽  
Solanum Pennellii ◽  
Initial Product ◽  
Basic Aspect ◽  
Tissue Interactions ◽  
Graft Interface ◽  
Antigen Antibody ◽  
Standard Fixation

Cell and tissue interactions are a basic aspect of eukaryotic growth and development. While cell-to-cell interactions involving recognition and incompatibility have been studied extensively in animals, there is no known antigen-antibody reaction in plants and the recognition mechanisms operating in plant grafts have been virtually neglected.An ultrastructural study of the Sedum telephoides/Solanum pennellii graft was undertaken to define possible mechanisms of plant graft incompatibility. Grafts were surgically dissected from greenhouse grown plants at various times over 1-4 weeks and prepared for EM employing variations in the standard fixation and embedding procedure. Stock and scion adhere within 6 days after grafting. Following progressive cell senescence in both Sedum and Solanum, the graft interface appears as a band of 8-11 crushed cells after 2 weeks (Fig. 1, I). Trapped between the buckled cell walls are densely staining cytoplasmic remnants and residual starch grains, an initial product of wound reactions in plants.

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