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Search Results: 1 - 10 of 197207 matches for " APPEZZATO-DA-GLóRIA B "
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Anatomical aspects of IBA-treated microcuttings of Gomphrena macrocephala St.-Hil
Moreira, Míriam F.;Appezzato-da-Glória, Beatriz;Zaidan, Lilian B.P.;
Brazilian Archives of Biology and Technology , 2000, DOI: 10.1590/S1516-89132000000200012
Abstract: gomphrena macrocephala st.-hil. (amaranthaceae) is a perennial herb from the cerrado with medicinal properties and ornamental interest. plants can be micropropagated through nodal segments, but acclimatization is difficult. the aim of this study was to establish a relationship between anatomical aspects of the roots and the acclimatization process. when cultures were supplemented with iba, callus and thick and frangible roots appeared at the base of the microcuttings. a fragile vascular connection between roots and shoots was observed. abnormal adventitious roots showing alteration in the vascular cylinder and hypertrophy of the cortical cells were also noted. these roots interfere in the transfer to extra vitrum conditions. when no growth regulator was used, no callus was formed, the adventitious roots were similar to those found in seedlings, and acclimatization could proceed. the results show that the origin and the structure of roots formed in the microcuttings play an important role in the acclimatization process and thus in the establishment of the micropropagated plants.
Efeitos de reguladores vegetais no desenvolvimento e na produtividade do amendoinzeiro (Arachis hypogaea L.)
Castro, P.R.C.;Appezzato-da-Glória, B.;
Scientia Agricola , 1993, DOI: 10.1590/S0103-90161993000200003
Abstract: this research deals with the effects of plant growth regulators on groundnut growth (arachis hypogaea l. cv. tatu-53). plants of groundnut with four leaves grown in pots under greenhouse conditions, were sprayed with chlormequat 2000 ppm, daminozide 4000 ppm, gibberellic acid 100 ppm, indolylacetic acid 100 ppm, mid check treatment. daminozide 4000 ppm reduced plant height, internode number and the length of the fourth internode. daminozide increased the number of leaves, retarded flowering, increased the number of flowers and presented a tendency to increase the dry weight of stems. chlormequat 2000 ppm and indolylacetic acid 100 ppm reduced plant height and the lenght of the fourth internode of the groundnut plant stem.
Aerial stem and leaf morphoanatomy of some species of Smilax
Aline R. Martins,Aline B. Bombo,Anielca N. Soares,Beatriz Appezzato-da-Glória
Revista Brasileira de Farmacognosia , 2013,
Abstract: This study aimed to describe the morphoanatomy of the aerial vegetative organs of seven Smilax species, used in Brazilian folk medicine. Samples of leaves and stems were fixed with FAA 50, embedded in historesin, sectioned on a rotary microtome, stained and mounted in synthetic resin. Cuticle ornamentation was analyzed with standard scanning electron microscopy. In the frontal view, the walls of the adaxial epidermis are straight in S. brasiliensis, S. cissoides, S. goyazana and sinuous in the other species. The walls of the epidermis on the abaxial surface are straight in S. brasiliensis, S. goyazana, S. rufescens, sinuous in S. campestris, S. fluminensis, S. oblongifolia, and wavy in S. cissoides. The stomata are paracytic in S. brasiliensis, S. goyazana, S. oblongifolia, and S. rufescens, anomocytic in S. cissoides, S. campestris; anisocytic and paracytic in S. fluminensis. The midrib has three vascular bundles that are individually wrapped by lignified cells in S. brasiliensis, S. cissoides, and S. fluminensis. In the other, the three vascular bundles are surrounded by a single lignified sheath. In the stems the vascular cylinder is surrounded by a sclerenchymatous ring with the exception of Smilax fluminensis, which has a starch sheath and internal layers of thin-walled cells.
Altera??es anat?micas em estacas de seringueira (Hevea brasiliensis clone RRIM 600) em resposta a diferentes técnicas de indu??o ao enraizamento
Medrado, M.J.S.;Appezzato-da-Glória, B.;Costa, J.D.;
Scientia Agricola , 1995, DOI: 10.1590/S0103-90161995000100016
Abstract: clones of hevea spp are presently grafted on seedlings, because no economic method of producing clonal rootstocks by vegetative means or clonal cuttings has so far been discovered. because of this, hevea clones do not exteriorize their maximum genetic potential for latex production. the rooting of clonal cuttings overcomes this problem. however, hevea is considered a plant with very poor capacity of rooting, in its mature phase. plants have at the stem base an almost continuous cylinder of lignified tissues, which along with chemical barriers can difficult rooting. at present, rooting problems in some plant species may be overcome by a combination of new techniques as it is the case of total or local etiolation and girdling. this work has the aim to characterize the modifications occurred in clonal cuttings of hevea when subjected to the above mentioned techniques, alone or combined. it was possible to conclude that the girdling of the cutting base from the rrim 600 clone, as well as its utilization in combination with the other two types of etiolation, promoted drastic alterations in the sheath, as compared to the control. moreover, girdling promoted the activity of the vascular cambio, which produced a greater number of parenquimatous cells in the phloem, resulting in a discontinuity, of the perivascular fibers sheath. other alterations elapsed of the girdling were: the division of parenquimatous cells around of the sheath forming meristematic rings and a greater number of lenticells in comparison to the control, which can favor the rooting of the cuttings.
Scientia Agricola , 1996, DOI: 10.1590/S0103-90161996000100010
Abstract: the anatomy of the mature leaf and stem of the cacao tree is described in this study emphasizing the characterization of trichomes and secretory structures. stem and leave ( limb and petiole) samples from the 3rd node and 5cm long young leaves were analysed. leaf lamina is hypostomatic with anomocytic stomata. four types of trichomes, two tectorial and two glandular occur in both limb surfaces. in the adaxial epidermis there are mucilage secretory glands. the mesophyll is dorsiventral; the palisade parenchyma is formed by two or three layers. the lacunary parenchyma has collecting cells. along the mesophyll collateral bundles predominate involved by sclerenchymatic sheath extending up to the epidermis. standard venation is of camptodrome type with mixed brochidrodomous and eucamptodromous ramification. petiole and stem show the epidermis with the same type of trichomes described to the limb. in their cortical and medullary parenchyma there are cells containing starch grains, idioblasts containing druses and mucilage canals. the vascular system along the petiole differentiates regarding the organization. the stem shows chlorenchyma and collenchyma layers. sclerification of collenchyma occurs during the plant development. discontinuous fiber ring of the primary phloem follows. medulla is abundant and its sclerification occurs during the development.
Scientia Agricola , 1998, DOI: 10.1590/S0103-90161998000200007
Abstract: the propagation of grapes is ordinarily carried out by vegetative methods like cuttings and graftings, which not always present satisfactory results, especially for those species with low rooting ability, endangering the commercial production. the muscadine grape (vitis rotundifolia michx.) is considered recalcitrant for rooting. its propagation by cuttings shows that growth regulators have few or no benefits on rooting. nowadays, air-layering is reported as a propagation method that promotes good rooting when combined with the application of growth regulators. this work aimed to evaluate the efficiency of air-layering process in relation to muscadine grape rooting, as well as to study the callus and the adventitious root anatomy. the results showed that the practice of ringing is more successfull than the bark retreating for rooting. the addition of naphtalene acetic acid did not affect significantly the rooting. the adventitious roots appeard close to the cambial area at the node and internode branch regions. there was no root formation from callus tissue. its tissue was characterized by meristematic activity and absence of starch.
Scientia Agricola , 1998,
Abstract: A multiplica o das videiras é comumente realizada através de processos vegetativos como a estaquia e a enxertia, os quais nem sempre apresentam resultados satisfatórios, especialmente para as espécies de difícil enraizamento, comprometendo a produ o comercial. A uva muscadínia (Vitis rotundifolia Michx.) é considerada uma planta difícil de enraizar. Sua propaga o através da estaquia mostra que o emprego de reguladores vegetais proporciona pouco ou nenhum benefício ao enraizamento das estacas. Atualmente, a alporquia em frutíferas vem se apresentando como um método de propaga o que proporciona um bom enraizamento, aliado à aplica o de reguladores vegetais. Este trabalho procurou avaliar a eficiência do processo de alporquia com rela o ao enraizamento da uva muscadínia bem como estudar a anatomia dos calos e das raízes adventícias. Pode-se concluir que a prática do anelamento mostra-se mais efetiva em proporcionar o enraizamento do que a retirada de lascas. A adi o de ácido naftalenacético n o afetou significativamente o enraizamento. As raízes adventícias apareceram nas proximidades da regi o cambial, nas regi es nodais e internodais dos ramos. N o ocorreu a forma o de raízes diretamente do calo. O tecido do calo caracterizou-se por ser meristematicamente ativo e n o apresentar amido.
Scientia Agricola , 1996,
Abstract: O presente estudo teve como objetivo descrever a anatomia da folha e do caule adulto enfatizando a caracteriza o dos tricomas e das estruturas secretoras do cacaueiro. Foram analisadas amostras de caule e folhas (limbo e pecíolo), correspondente ao 3o nó, além de folhas novas de 5cm de comprimento. A lamina foliar é hipoestomática, com est matos do tipo anomocítico. Em ambas as faces do limbo ocorrem quatro tipos de tricomas: sendo dois tectores e dois glandulares. Na epiderme adaxial est o presentes as glandulas secretoras de mucilagem. O mesofilo é dorsiventral; o parênquima pali ádico é formado por duas ou três camadas. O parênquima lacunoso apresenta células coletoras. Ao longo do mesofilo predomina feixes colaterais envolvidos por bainha esclerenquimática que se estende até as epidermes. O padr o de vena o é do tipo Camptodroma com ramifica es mistas Brochidrodomas e Eucamptodromos. O pecíolo e o caule apresentam a epiderme com os tricomas descritos para o limbo; No parênquima cortical e medular do pecíolo e caule, há células contendo gr os de amido, idioblastos contendo drusas e canais de mucilagem. O sistema vascular ao longo do pecíolo se diferencia quanto a organiza o. O caule apresenta camadas de clorênquima, e de colênquima. Ocorre a esclerifica o das células deste último, com o desenvolvimento. Segue-se um anel descontínuo de fibras do floema primário. A medula é ampla e se esclerifica com o desenvolvimento.
Caracteriza??o anat?mica e fitoquímica de folhas e rizomas de Hedychium coronarium J. K?nig (Zingiberaceae)
Martins, M.B.G;Caravante, A.L.C;Appezzato-Da-Glória, B;Soares, M.K.M;Moreira, R.R.D;Santos, L.E;
Revista Brasileira de Plantas Medicinais , 2010, DOI: 10.1590/S1516-05722010000200009
Abstract: due to the great potentiality regarding the use of hedychium coronarium in folk medicine and also as a bioremediator in effluent treatment, this study aimed to diagnose leaf and rhizome in order to elucidate structural and phytochemical results. hedychium coronarium leaf is amphistomatal, with predominance of stomata on the abaxial surface. on both leaf surfaces, there are epicuticular wax projections over the anticlinal walls from epidermal cells. the dorsiventral mesophyll presents multiseriate (3 layers) hypoderm on both sides. the chlorophyllian parenchyma is differentiated into palisade (1-2 layers) and spongy (4-5 layers) with many intercellular spaces and some crystalliferous idioblasts. in the midrib, the aerenchyma occurs in a single arc on the abaxial surface. the vascular bundles are randomly distributed and present different sizes: small, medium and large, involved by fibers. the smallest bundles are found on the abaxial rib surface. the leaf phytochemical analysis showed the presence of saponins and lack of tannins, anthraquinones, alkaloids and flavonoids. using thin-layer chromatography, the presence of caryophyllene and myrcene was detected in the crude essential oil obtained from h. coronarium leaves.
Morpho-anatomical features of underground systems in six Asteraceae species from the Brazilian Cerrado
Appezzato-da-Glória, Beatriz;Cury, Graziela;
Anais da Academia Brasileira de Ciências , 2011, DOI: 10.1590/S0001-37652011005000018
Abstract: in the brazilian cerrado (neotropical savanna), the development of bud-bearing underground systems as adaptive structures to fire and dry periods can comprise an important source of buds for this ecosystem, as already demonstrated in the brazilian campos grasslands and north american prairies. asteraceae species from both woody and herbaceous strata have subterranean organs that accumulate carbohydrates, reinforcing the adaptive strategy of these plants to different environmental conditions. this study aims to analyse the morpho-anatomy of underground systems of six species of asteraceae (mikania cordifolia l.f. willd., mikania sessilifolia dc, trixis nobilis (vell.) katinas, pterocaulon alopecuroides (lam.) dc., vernonia elegans gardner and vernonia megapotamica spreng.), to describe these structures and to verify the occurrence and origin of shoot buds, and to analyse the presence of reserve substances. individuals sampled in cerrado areas in s?o paulo state showed thick underground bud-bearing organs, with adventitious or lateral roots and presence of fructans. xylopodium was found in all studied species, except for trixis nobilis, which had stem tuber. the presence of fructans as reserve, and the capacity of structures in the formation of buds indicate the potential of herbaceous species of asteraceae in forming a viable bud bank for vegetation regeneration in the brazilian cerrado.
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