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Titolo:
Regeneration of reproductive structures of Potamogeton pectinatus, Ruppia maritima, Zannichellia palustris and Chara contraria: Effect of temperature
Autore:
Acosta, LW; Sabbatini, MR; Hernandez, LF; Fernandez, OA;
Indirizzi:
Univ Nacl Sur, Dept Agron, RA-8000 Bahia Blanca, Buenos Aires, Argentina Univ Nacl Sur Bahia Blanca Buenos Aires Argentina RA-8000 ires, Argentina CIC, Buenos Aires, DF, Argentina CIC Buenos Aires DF ArgentinaCIC, Buenos Aires, DF, Argentina
Titolo Testata:
PHYTON-INTERNATIONAL JOURNAL OF EXPERIMENTAL BOTANY
fascicolo: 1-2, volume: 63, anno: 1998,
pagine: 167 - 178
SICI:
0031-9457(1998)63:1-2<167:RORSOP>2.0.ZU;2-X
Fonte:
ISI
Lingua:
SPA
Soggetto:
AQUATIC PLANT MANAGEMENT; WESTERN-EUROPE; GERMINATION; ARGENTINA; ECOLOGY; TUBERS; TAXA;
Keywords:
aquatic weeds; germination; seed bank; seeds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Acosta, LW Univ Nacl Sur, Dept Agron, RA-8000 Bahia Blanca, Buenos Aires, Argentina Univ Nacl Sur Bahia Blanca Buenos Aires Argentina RA-8000 tina
Citazione:
L.W. Acosta et al., "Regeneration of reproductive structures of Potamogeton pectinatus, Ruppia maritima, Zannichellia palustris and Chara contraria: Effect of temperature", PHYTON, 63(1-2), 1998, pp. 167-178

Abstract

The effect of temperature on propagule germination was investigated in Potamogeton pectinatus, Ruppia maritima, Zannichellia palustris and Chara contraria, main aquatic weeds in the irrigation system of the lower Valley of the Colorado River (Argentina) [Valle Inferior del Rio Colorado (VIRC, 39 degrees 30' S and 63 degrees 00' W)]. Propagules were separated from harvested plants or from sediment collected in the artificial canal system. In the laboratory, propagule germination was examined at temperatures ranging from2 to 41 degrees C during 30 days, followed by an additional 30 days at 19 degrees C. No germination was found at 2 degrees C, 36 degrees C and 41 degrees C in the first 30 days. Except for P. pectinatus seeds from the bank, there was no germination at 19 degrees C in propagules maintained at 36 degrees C or 41 degrees C. Those propagules which had been kept at low temperatures germinated between days 30-60. The optimum germination (p< 0.05) range fluctuated among propagules. In P. pectinatus germination was Door, but at 14 - 27 degrees C, 82% of the tubers sprouted in the first 10 days. In the first 30days, seeds of Z. palustris germinated 66.8% between 6 and 27 degrees C and those of R. maritima 52.3% between 19 and 24 degrees C. Oospores of C. contraria germinated a maximum of 36.6% in the optimum range 24 - 27 degrees C. We conclude that winter temperatures at VIRC would allow seed germination of Z. palustris. Optimum germination range for all propagules coincide with mean spring and summer temperatures, although oospores of C, contraria would require higher temperatures.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/10/20 alle ore 05:56:24