Comparative Studies on Field Performance of Heliothis Larval Parasitoids Microplitis croceipes and Cardiochiles nigriceps at Varying Densities and under Selected Host Plant Conditions

1989 ◽  
Vol 72 (1) ◽  
pp. 6 ◽  
Author(s):  
W. J. Lewis ◽  
H. R. Gross
Keyword(s):  
Host Plant ◽  
Comparative Studies ◽  
Field Performance ◽  
Microplitis Croceipes ◽  
Larval Parasitoids ◽  
Cardiochiles Nigriceps

The discovery of devil's gardens: an ant–plant mutualism in the cloud forests of the Eastern Amazon

2016 ◽  
Vol 32 (3) ◽  
pp. 264-268 ◽  
Author(s):  
Alex Salas-Lopez ◽  
Stanislas Talaga ◽  
Hadrien Lalagüe
Keyword(s):  
Host Plant ◽  
Comparative Studies ◽  
Evolutionary History ◽  
Host Plants ◽  
Amazon Basin ◽  
Plant Distribution ◽  
Geographic Isolation ◽  
Cloud Forests ◽  
Ancient Forest ◽  
History Of

Abstract:Devil's gardens are one of the most remarkable mutualistic associations between ants and plants. Myrmelachista ants eliminate all vegetation from around their host plants, resulting in wide forest clearings which have intrigued scientists from the start. Despite their noticeability, here we report the discovery of devil's gardens in remote highland cloud forests of the Eastern Amazon, more than 2000 km away from their nearest known analogues in Western Amazonia. We describe the ecological characteristics of these gardens and consider what factors could have produced the geographic isolation of Eastern Amazonian devil's gardens. Three hypotheses are investigated: (1) the host plant distribution restricts the distribution of the mutualism, (2) the ecological tolerances of Myrmelachista explain the isolation, and (3) the devil's gardens of the Eastern Amazon constitute relicts from ancient forest refugia. The distribution of the possible associated myrmecophytes and previously described ecological ranges of devil's gardens cannot explain their ecological restriction to cloud forests in Eastern Amazonia, but our discovery is consistent with the biogeographic refuge hypothesis (i.e. highlands along the Amazon Basin constitute refugia for humid forests that spread during the Cenozoic). Our finding opens exciting perspectives for comparative studies of the origin, ecology and evolutionary history of this ant–plant mutualism.

scholarly journals Comparative Studies on Field Performance of Micropropagated and Conventionally Propagated Sugarcane Plants

1970 ◽  
Vol 16 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Neeru Sood ◽  
Piyush Kumar Gupta ◽  
RK Srivastava ◽  
SS Gosal
Keyword(s):  
Tissue Culture ◽  
Comparative Studies ◽  
Field Performance ◽  
Cane Yield ◽  
Sugar Recovery ◽  
Agronomic Practices

The tissue culture derived sugarcane var. CoJ 64 plants attained better height, millable cane height and a greater number of live buds to conventionally raised plants. Further, the plants raised in vitro showed 13.2% increase in cane yield and 11.03% sugar recovery as compared to conventionally propagated sugarcane under parallel agronomic practices in the field, advocating suitability of seed cane programmed through tissue culture.Key words: Comparative studies, Field performance, Sugarcane, MicropropagationDOI = 10.3329/ptcb.v16i1.1102Plant Tissue Cult. & Biotech. 16(1): 25-29, 2006 (June)

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