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Trends of specialization in pollen of flacourtiaceae with comparative observations of cochlospermaceae and bixaceae

, : Trends of specialization in pollen of flacourtiaceae with comparative observations of cochlospermaceae and bixaceae. Grana 15(1-3): 29-50

Pollen from 17 genera [Erythrospermum, Streptothamnus, Berberidopsis, Carpotrochi, Mayna, Caloncoba, Lindackeria, Buchnerodendron, Mocquerysia, Azara, Itoa, Cesearia, Samyda, Bixa, Hydnocarpus, Ahernia and Rawsonia] of Flacourtiaceae was examined by (scanning electron microscope) and (transmission electron microscope) TEM; 12 of them represented the primitive tribes Berberidopsideae and Oncobeae. Small, minutely structured grains are widespread in this family, and are often lumped together as 1 morphological type. A study of the relative thickness of the tectal layers, and of the arrangement and size of columellae and perforations, indicates that not all minutely structured grains are homologous in development. Most genera of Berberidopsideae and Oncobeae can be termed microperforate tectate, as the muri are X2-5 as wide as the lumina and both features are less than 1 .mu.m in diameter. Berberidopsis pollen is unique in the Flacourtiaceae in being tricolpate and in having a rough, thick tectum infrequently traversed by microperforations 0.03 .mu. in diameter. Tendencies toward perreticulate structure occur in Mocquerysia. Development of a high infratectal space is illustrated by Casearia nitida and an intectate exine in the related Samyda dodecandra. Pollen of Cochlospermum and Bixa are distinct from Flacourtiaceae and show independent trends of specialization.

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Penafiel, S. R.; Botengan, H. P., 1985: Indigenous agroforestry in Benguet: starting point for research and development. Brief descriptions are given of the 8 main agroforestry practices along the western side of Benguet Province, Philippines: akleng parang (Albizzia [Albizia] procera), with some other forest and fruit trees underplanted with various agricultural cr...

Macdonald, IAW., 1981: Much ado about mammals: wildlife management in South Africa in 1981. South African Journal of Science, 778: 349-352

Haymon R. M.; Kastner M., 1982: The formation of high-temperature clay minerals from basalt alteration during hydrothermal discharge on the East Pacific rise at 21 degrees N. Eos, Transactions, American Geophysical Union 63(45): 1135

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Marar, M. M. K.; Pandalai, K. M., 1961: A comparison of Chilean nitrate with ammonium sulphate as a nitrogen source for the coconut palm. Fertilizers were applied at rates of 1 lb. N, 0.5 lb. P2O5 and 1 lb. K2O per tree per year. The responses to all 3 nutrients were significant over the 6 years of the experiment. Chilean nitrate proved superior to ammonium sulfate as a source of N,...

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