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Titolo:
GROWTH AND CARBON UTILIZATION BY SPROUTED PROPAGULES OF 2 SPECIES OF SUBMERSED ROOTED AQUATIC PLANTS GROWN IN DARKNESS
Autore:
SPENCER DF; KSANDER GG;
Indirizzi:
UNIV CALIF DAVIS,AGR RES SERV,USDA,AQUAT WEED CONTROL RES LAB,WEED SCI PROGRAM DAVIS CA 95616
Titolo Testata:
Hydrobiologia
fascicolo: 1, volume: 317, anno: 1996,
pagine: 69 - 78
SICI:
0018-8158(1996)317:1<69:GACUBS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIOECIOUS HYDRILLA; TEMPERATURE; GERMINATION; LIGHT;
Keywords:
TUBER; WINTER BUD; CARBON BUDGET; SPROUTING; AQUATIC PLANT MANAGEMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
D.F. Spencer e G.G. Ksander, "GROWTH AND CARBON UTILIZATION BY SPROUTED PROPAGULES OF 2 SPECIES OF SUBMERSED ROOTED AQUATIC PLANTS GROWN IN DARKNESS", Hydrobiologia, 317(1), 1996, pp. 69-78

Abstract

Hydrilla verticillata (L.f. ) Royle tubers from monoecious plants and Potamogeton gramineus L. winter buds were sprouted and allowed to growin the dark for 120 days. We measured plant length and counted the number of leaves at 2-3 day intervals. Hydrilla grew most rapidly duringthe first 16-17 days and Potamogeton grew most rapidly during the first 16-25 days. Measurement of propagule carbon content over time indicated that cessation of rapid growth coincided with depletion of tuber carbon by one-half for Hydrilla. For Potamogeton, growth was reduced after 16 to 25 days while the winter bud C half-life was 37 days. Calculations indicated that Hydrilla mobilized 49% and Potamogeton 39% of the initial propagule carbon to support growth. In a second experiment,in which plants were grown in substrate the plants grew taller and produced slightly more leaves per plant. Potamogeton removed from darkness after specified time periods, and allowed to grow for 21 days in a greenhouse recovered from 20-30 days in the dark. Similarly treated Hydrilla plants recovered from up to 80 days in the dark. Potamogeton had mobilized 79% of initial C by the time it was unable to recover fromthe dark treatment. Combined results for both species indicate that the majority of propagule C was utilized in the first 16 to 30 days following sprouting. In conjunction with an understanding propagule sprouting requirements, this information will be useful in the timing of application for management techniques.

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Documento generato il 26/09/20 alle ore 11:01:41