no taxonomic revision for the Santa Fe province. Some species were observed in nature but the work was done mainly on specimens from the UNR (Rosario), ...
BIOCELL 2002, 26(1): 119-152
ISSN 0327 - 9545 PRINTED IN ARGENTINA
ROSARIO BIOLOGY SOCIETY (Sociedad de Biología de Rosario)
Abstracts from the
XXI ANNUAL MEETING
November 26-27, 2001 Sede de Gobierno de la Universidad Nacional de Rosario Rosario, ARGENTINA
120
ABSTRACTS
BIOCELL, 26(1), 2002
BIOCELL, 26(1), 2002
ABSTRACTS
121
1. FIRST APPROACH TO THE STUDY OF THE MORACEAE FAMILY IN SANTA FE PROVINCE (ARGENTINA) Biani, Natalia B.; Maturo, Hernán M.; García, Roque C.A. and Darién E. Prado Cátedra de Botánica Morfológica y Sistemática, Facultad de Ciencias Agrarias (UNR), C.C.Nº14, S2125ZAA Zavalla.
2. FLORA OF THE SANTA FE PROVINCE (ARGENTINA): PRELIMINARY REPORT ON APOCYNACEAE García, Roque C.; Lusardi, María B.; Gattuso, Susana J.; Prado, Darién E. Cátedra de Botánica Sistemática, Facultad de Ciencias Agrarias (UNR), C.C. Nº 14, S2125ZAA Zavalla, Santa Fe.
The species of Moraceae are distributed within the tropical and subtropical regions of the five continents. In our country it is represented by six genera and 17 species, 15 of which are autochthonous and two are exotic. Remarkably, none of these species has been cited for the province in the most recent revision of the Vascular Flora of the Argentina. Based on specimens from Esperanza (SF) and Rosario (UNR) Herbaria and on the field experience of the authors, the presence of the following species can be confirmed in our province: Morus alba L., Broussonetia papyrifera (L.) Vent. y Ficus luschnathiana (Miq.) Miq. They consist of unarmed trees with latex, sometimes strangling epiphytes, with alternate leaves. The presence of stipules that protect the whole leaf before its expansion is frequent. The flowers are small and arranged in inflorescences. The Ficus genus is represented by a monoecious tree, the female and male flowers are uniformly distributed on the inner surface of a concave receptacle called syconium with entomophilous pollination. The Broussonetia and Morus genera have female inflorescences in heads and in spikes respectively, while the male flowers are arranged in long and dense catkins in both genera with anemophilous pollination. This contribution provides keys based on morphological characters in order to distinguish genera and species, whereas a species distribution map is presented.
The Family Apocynaceae encompasses 175 genera and about 2000 mostly tropical species, though some of them occur in temperate regions. They are mainly climbing plants, while a few are trees, shrubs or standing herbs, all of them with latex tubes. Many species are toxic for animals and humans, while others have curative properties. Several drugs and gums can be obtained from some species and the wood of some trees are useful for charcoal production and furniture. Besides, many of them are beautiful ornamental plants. In the Santa Fe Province eight species can be found in the wild: Aspidosperma quebracho-blanco Schlecht., Aspidosperma triternatum Rojas Acosta, Forsteronia glabrescens Müll Arg., Macrosiphonia petraea (A. St. Hil.) K. Schum., Mandevilla pentlandiana (A. DC.) Woods., Mesechites sanctae-crucis (S. Moore) Woods., Rhabdadenia ragonesei Woods., and Tabernaemontana catharinensis A. DC. This is a preliminary taxonomic study based on a review of the specific literature, on observations of the species in nature and visits to the Esperanza (SF) and Rosario (UNR) Herbaria. A key of genera and species based on morphological characters, a distribution map, brief species descriptions and illustrations are presented.
3. PRELIMINARY STUDY OF THE CACTACEAE IN SANTA FE PROVINCE (ARGENTINA). II: OPUNTIOIDEAE Oakley, Luis J.; García, Roque C.A. and Prado, Darién E. Cátedra de Botánica, Facultad de Ciencias Agrarias (UNR), C.C. Nº 14, S2125ZAA Zavalla.
4. PRELIMINARY STUDY OF THE BUDDLEJACEAE FAMILY IN THE SANTA FE PROVINCE (ARGENTINA) Mc Cargo, Jorge C.; García, Roque C.A. and Prado, Darién E. Cátedra de Botánica, Facultad de Ciencias Agrarias (U.N.R.), C.C. N°14, S2125ZAA Zavalla.
Within the Family Cactaceae, the Subfamily Opuntioideae is the biggest and more widely distributed, ranging from southern Canada to Argentina, except for Peru and Chile. Nowadays some species have spread to other continents constituting -in most cases- aggressive weeds. This Subfamily can be distinguished from the rest by the presence of glochids in the areoles. The number of genera included vary considerably according to the classification system. The most relevant genus, given its number of species (about 200) and its economic importance, is Opuntia Mill., with the Mexican Opuntia ficus-indica (L.) Mill. widely cultivated because of the edible fruits. The aim of this communication is to contribute to the taxonomic study and the geographic and ecological distribution of the Family Cactaceae, Subfamily Opuntioideae in the province of Santa Fe. Most species were studied in nature and also collected and cultivated. Bibliographic revision and visits to Rosario (UNR), Esperanza (SF) and Darwinion (SI) Herbaria were also carried out. The Opuntioideae are represented by only one genus: Opuntia Mill., with ten species, eight of them native: O. anacantha Speg. var. retrorsa (Speg.) R. Kiesling , O. chaquensis Speg., O. discolor Britton & Rose, O. paraguayensis K. Schum., O. prasina Speg., O. quimilo K. Schum., O. salmiana Parm. y O. sulphurea Gillies ex Salm-Dyck var. pampeana (Speg.) Backeb. and two introduced: O. ficus-indica (L.) Mill. y O. monacantha Haw. Distribution maps of the species and a key based on morphological characters are presented.
This family include eight genera and about 125 species of tropical, subtropical and temperate regions, and they consist of trees, shrubs, subshrubs and rarely herbs. Leaves are simple, opposite decussate, with star and/or glandular trichomes specially in the hypophyll and in young branches. The leafy stipules join the leaf basis. Inflorescences in compound cymes accompanied by bracts. The flowers are generally tetramerous, actinomorphic, perfect or functionally dioecious. The calyx is tetralobed, tubular, while the corolla is hypocraterimorphus. The androecium presents four sessile, introrse stamens. The bilocular ovary, with a nectary zone in the base and tomentous in the upper part, has a bilobed or globose stigma. Fruit: septicidal or loculicidal capsule, with small, generally winged seeds. Buddleja L. is the only genus cited for Argentina with 15 species distributed from the north up to Chubut. Untill present there exist no taxonomic revision for the Santa Fe province. Some species were observed in nature but the work was done mainly on specimens from the UNR (Rosario), SF (Esperanza) and SI (Darwinion, San Isidro) Herbaria. Three shrub species were found in Gral. Obligado, San Cristóbal, Las Colonias, Garay, La Capital y Rosario departments: Buddleja brasiliensis Jacq. ex Spreng., Buddleja tubiflora Benth. and Buddleja grandiflora Cham. et Schlecht. A dichotomic key based on morphological characters, photographs and a distribution map are presented here.
122
ABSTRACTS
5. PRELIMINARY STUDY OF THE PAPAVERACEAE AND FUMARIACEAE SPECIES OF THE SANTA FE PROVINCE Gattuso, Martha A.1; Di Sapio, Osvaldo A.1; García, Roque C. A.2 and Prado, Darién E.2 1 Cátedra de Botánica, Facultad de Ciencias Bioquímicas y Farmacéuticas, (UNR), Suipacha 531 (2000) Rosario. 2 Cátedra de Botánica, Facultad de Ciencias Agrarias (U.N.R.), C.C. N°14, S2125ZAA Zavalla. The closely related Families Papaveraceae and Fumariaceae have given rise to certain controversy as regards their taxonomic position. The former criteria placed Fumariaceae together with Papaveraceae as Suborder Fumariae, or as Subfamily Fumarioideae in a wider Papaveraceae, however, modern morphological and anatomical studies suggest splitting Fumariaceae as a separate family. In Argentina the Family Papaveraceae is represented by five genera and 12 species while the Family Fumariaceae only by a single genus and six species. The methodology consisted in a deep bibliographic revision, visits to herbaria (SF, UNR, MFA), and field observation on some species in nature. The only Fumariaceae in Santa Fe is the adventitious Fumaria officinalis L., commonly found in crop fields and road sideways. Meanwhile, there exist two herbaceous species of Papaveraceae: Argemone subfusiformis G.B. Ownbey and Papaver rhoeas L., both occuring in north-central departments of the province. It is here provided taxonomical information, illustrations and distribution maps. A key based on morphological characters was performed as well in order to circunscribe the different taxa.
7. EFFECT OF DIFFERENT CULTURE MEDIA ON THE OCCURRENCE OF HYPERHYDRIC STRUCTURES IN SUNFLOWER (Helianthus annuus L.) Mayor, M.L.*; Nestares, G; Zorzoli, R; Ludueña, P.1 and Picardi, L. Cátedra de Genética, Facultad de Ciencias Agrarias, UNR-CIURNCONICET, C.C. 14. C.P.: 2125. Zavalla. 1Sección Girasol. E.E.A. INTA Pergamino. *Maestría en Genética Vegetal (INTA-UNR). In order to reduce the occurrence of hyperhydric structures, the response of a sunflower inbred line with high regeneration potential (HA 300B) was evaluated in fourteen different culture media. The culture media were formulated on MS saline base with the addition of indol-3-acetic acid (IAA), 2 levels of kinetin (KIN) and 3 levels of silver nitrate, casein hydrolisate, calcium nitrate and cobalt nitrate, respectively. Cotyledons were used as explants. A completely randomised design with 2 replications of 20 explants each per treatment was utilized. Cultures were grown at 25ºC ± 2ºC with a 12-hr photoperiod for 37 days. The traits analysed were: percentage of regeneration (RP), percentage of hypertrophy (HP), percentage pf hyperhydric shoots (HS), percentage of hyperhydric primordia (HPr), shoots productivity rate (SPR), primordia productivity rate (PPR) and shoots proliferation rate (SFR). Among all media, the inbred line differed for SPR, PPR, HPr (p
