Results 131 to 140 of about 911 (160)
Some of the next articles are maybe not open access.
Structure and physiology of Cycad coralloid roots
Giornale Botanico Italiano (Florence, Italy: 1962), 1993Abstract The gonidial zone organization of coralloid roots of Cycas revoluta is reported together with the taxonomy of cyanobiont, the physiology of the association and the significance of nitrogen fixation. Recent data on gonidial zone composition obtained by microelectrodes and immunogold labeling are referred in order to determine the mechanisms of ...
Grilli Caiola, M, CANINI, ANTONELLA
exaly +3 more sources
ON THE PHYCOBIONTS OF THE CYCAD CORALLOID ROOTS [PDF]
New Phytologist, 1980 SummaryThe structure, ultrastructure and the developmental cycle of the phycobionts living in the coralloid roots of various cycads growing in different Italian Botanical Gardens were studied. The phycobionts were examined in the various zones of the coralloids from the top towards the base. All the phycobionts observed have the characteristics typical
exaly +2 more sources
Coralloid root regeneration on Macrozamia megagametophites
Giornale botanico italiano, 1980Abstract Megagametophytes of Macrozamia communis were incubated in White's Basal Medium and in White's Basal Medium modified with 2,4-D and kinetin. On the medium enriched with growth substances, regeneration of coralloid roots was induced. These are morphologically identical to sporophytic coralloid roots, without any endosymbiont and displaying ...
Paolo De Luca +3 more
openaire +1 more source
Regeneration of coralloid roots on cycad megagametophytes
Plant Science Letters, 1980Abstract Megagametophytes of Cycas revoluta Thunb. incubated in White's Basal Medium regenerated coralloid roots only in the presence of 2,4-D and kinetin. No microorganism was detected in the cultures. These results suggest that coralloid roots are an inherent feature of the cycad root system and that their formation is not induced by any ...
Paolo De Luca, Sergio Sabato
exaly +2 more sources
Characterization of a symbiotic, heterocystous, N2-fixing cyanobacterium fromCycas coralloid roots
World Journal of Microbiology and Biotechnology, 1992A symbiotic, heterocystous, N2-fixing blue-green alga, isolated from the coralloid roots of a xerophytic plant,Cycas revoluta, grew best in liquid medium supplemented with 4 mM NO 3 (-) . Morphologically, the isolated alga was identical to that of the natural endophyte but the cell size had decreased markedly. The alga was heterotrophic.
A, Sharma, D P, Mishra, A, Kumar
exaly +3 more sources
Akinete ultrastructure of Nostoc species isolated from cycad coralloid roots
Canadian Journal of Botany, 1980Nostoc strains isolated from different cycad coralloid roots were grown in culture until sporulation to study the structure and ultrastructure of akinetes. These cells have cell walls enclosed by two different envelopes produced by the vegetative cells during akinete differentiation, and cytoplasm containing thylakoids, cyanophycin granules ...
Maria Grilli Caiola, Luisa De Vecchi
openaire +1 more source
Phycologia, 2021
Endogenously formed coralloid roots in living cycads are known to be infected and maintained by a mutual partnership with photosynthetic cyanobacteria.
Melissa H. Pecundo +6 more
openaire +1 more source
Endogenously formed coralloid roots in living cycads are known to be infected and maintained by a mutual partnership with photosynthetic cyanobacteria.
Melissa H. Pecundo +6 more
openaire +1 more source
South African Journal of Botany, 1986 Thirty-three species of Encephalartos, which include all the known species indigenous to the Republic of South Africa, together with Stangeria eriopus, were found to form coralloid roots. In all cases, specimens were found in which the coralloid roots were infected with Cyanobacteria (blue-green algae) and these roots in all cases reduced acetylene to ...
Grobbelaar, N. +2 more
exaly +2 more sources
Antiviral activity of coralloid root ofCycas revoluta extract against some viruses of tomato plant
Experientia, 1984Crude coralloid root extract ofCycas revoluta showed significant antiviral activity against viruses of the tomato plant (PVX, PVY, TMV, TAV and TRSV) when applied 24 h before virus inoculation, or when mixed with different virus inocula before virus inocultion, in hypersensitive and systemic hosts.
G. P. Rao +3 more
openaire +1 more source
Coralloid Root Systems in Plants showing Lime-induced Chlorosis
Nature, 1967LIME-INDUCED chlorosis is a well known nutritional disorder of species growing on calcareous soils. The overt symptoms are the development of interveinal chloroses, which are commonly more severe in young leaves. Only in severe cases are the veins themselves chlorotic.
openaire +1 more source