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排序方式: 共有85条查询结果,搜索用时 125 毫秒
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A COMPARISON OF FEEDING MECHANISMS IN MICROPHAGOUS, HERBIVOROUS, INTERTIDAL, PROSOBRANCHS IN RELATION TO RESOURCE PARTITIONING 总被引:2,自引:0,他引:2
HAWKINS S. J.; WATSON D. C.; HILL A. S.; HARDING S. P.; KYRIAKIDES M. A.; HUTCHINSON S.; NORTON T. A. 《Journal of Molluscan Studies》1989,55(2):151-165
Several microphagous grazers co-exist on British rocky shores.The nature of the microbial film which is their prime food sourceis outlined. The radula morphology, hardness, and feeding mechanismsof rhipidoglossan trochids (Gibbula, Monodonta) taenioglossanLittorina, and docoglossan Patella have been compared. Docoglossanscan penetrate hard substrates deeply, taenioglossans can onlypenetrate softer substrates, and rhipidoglossans appear to primarilybrush the surface. A preliminary study found some differencesin diet. Whether feeding mechanisms allow partitioning of themicrofloral film and whether this allows continuing co-existenceof intertidal grazers is discussed. 相似文献
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MILLER ROBYN M.; KAUL VIJAY; HUTCHINSON JAMES F.; MAHESWARAN GOWRI; RICHARDS DENNIS 《Annals of botany》1991,68(6):563-568
Adventitious shoots were regenerated from fragmented flowerbuds, individual petals and receptacles in a number of differentcarnation cultivars. The major site of shoot formation was thesubepidermal cells at the proximal end of the petals. The yieldof shoots from a single flower bud was high, ranging between70 and 275, for the 11 cultivars tested. The regeneration mediumcontained Murashige and Skoog basal medium supplemented with48 µm -naphthaleneacetic acid and 48 µmbenzyladenine. The preferred regeneration protocol appears highlysuited to the development of gene transfer systems. Adventitious shoots, Dianthus caryophyllus L., tissue culture, explant, auxin, cytokinin, cut flowers, floriculture, organogenesis 相似文献
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DAVID FURTH RENATA ALBRECHT KARIN MURASZKO G. EVELYN HUTCHINSON 《Systematic Entomology》1978,3(2):147-152
Scanning electron microscope studies were performed on the palar pegs of male forelegs of Trichocorixa sexcincta, Sigara alternata and Hesperocorixa interrupta. The studies showed the pegs to be basically conical and chevron-ridged, with a wide base that tapered of to a narrow apex. Clear species differences were apparent with respect to the size of the peg, the number of ridges on an individual peg, and the number and arrangement of the pegs on the pala. The possible behavioural and evolutionary significance of the palar pegs is discussed in relation to mating. 相似文献
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