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Corona development and floral nectaries of Asclepiadeae (Asclepiadoideae, Apocynaceae) Acta Botanica
Monteiro,Mariana Maciel; Demarco,Diego.
ABSTRACT Flowers of Asclepiadoideae are notable for possessing numerous nectaries and elaborate coronas, where nectar can accumulate but is not necessarily produced. Given the complexity and importance of these structures for reproduction, this study aimed to analyze the ontogeny of the corona, the structure and position of nectaries and the histochemistry of the nectar of species of Asclepiadeae. Two types of coronas were observed: androecial [C(is)] and corolline (Ca). The development of the C(is)-type of corona initiates opposite the stamens in all species examined with the exception of Matelea in which it begins to develop as a ring around the filament tube. Despite their morphological variation, coronas typically originate from the androecium. A...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asclepiads; Histochemistry; Ontogeny; Nectar; Structural; Diversity.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300420
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Structural and functional properties of Thai sago ( Metroxylon spp.) starch extracted from different trunk portions Thai Agricultural
Piyachomkwan, K.; Chotineeranart,, S.; Chollakup, R.; Hicks, A.; Oates, C.G.; Sriroth, K..
Palavras-chave: Structural; Functional; Propertie; Thai; Sago; Starch; Extracted.
Ano: 1999 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4820
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Structural and regulatory differences in amylase isoenzymes in germinating Brazilian barley cultivars Genet. Mol. Biol.
Georg-Kraemer,J.E.; Cavalli,S.S..
The amylase electrophoretic patterns of 10 Brazilian brewing-barley varieties with different malting grades and diastatic power were analyzed during the 7-day germination which occurs during the malting process. Intra and inter-variety genetic variability was observed at both the structural and regulatory level. In the first few days after germination all varieties showed a few active loci, all of them with low activity. In subsequent days, new loci became active and those already detected since early germination showed increased activity. All varieties showed a continuous increase in amylase synthesis until the 3rd and/or 4th day after germination. Some varieties maintained high amylase activity until the last day of germination, while others showed a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Barley; Amylases; Isoenzymes; Structural; Regulatory genetic differences.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000100012
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