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Titolo:
VARIATION IN EARLY VIGOR BETWEEN WHEAT AND BARLEY
Autore:
LOPEZCASTANEDA C; RICHARDS RA; FARQUHAR GD;
Indirizzi:
CSIRO,DIV PLANT IND,POB 1600 CANBERRA ACT 2601 AUSTRALIA CSIRO,DIV PLANT IND CANBERRA ACT 2601 AUSTRALIA COOPERAT RES CTR PLANT SCI CANBERRA ACT 2601 AUSTRALIA COLEGIO POSTGRAD,CTR GENET MEXICO CITY 56230 DF MEXICO AUSTRALIAN NATL UNIV,RES SCH BIOL SCI CANBERRA ACT 2601 AUSTRALIA
Titolo Testata:
Crop science
fascicolo: 2, volume: 35, anno: 1995,
pagine: 472 - 479
SICI:
0011-183X(1995)35:2<472:VIEVBW>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
WATER-USE EFFICIENCY; MEDITERRANEAN-TYPE ENVIRONMENT; CARBON ISOTOPE DISCRIMINATION; INCREASING EARLY VIGOR; SPRING WHEAT; TOTAL BIOMASS; NITROGEN; GROWTH; YIELD; CULTIVARS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
C. Lopezcastaneda et al., "VARIATION IN EARLY VIGOR BETWEEN WHEAT AND BARLEY", Crop science, 35(2), 1995, pp. 472-479

Abstract

In dryland Mediterranean-Like climates, barley (Hordeum vulgare L.) generally has higher grain and biomass yields than other temperate cereals. The advantage of barley compared with wheat (Triticum aestivum L.) is associated with barley's faster leaf area growth during vegetative development. Experiments were conducted in a glasshouse (average 25/15 degrees C) and outdoors (average 17/5 degrees C) to determine the traits associated with barley's greater early growth. Five cultivars each of barley and wheat were grown in large pots. Five harvests were made from the time there were about 2 leaves on the main stem to the time plants had about 4.5 leaves on the main stem. The weight of the caryopsis of all seeds sown was 35 mg. Barley produced approximate to 40% more aboveground biomass and two times greater leaf area than wheat bythe two-leaf stage. Barley had a 17% faster average leaf appearance rate and a 35% faster average tiller appearance Fate than wheat but there was no evidence that either contributed to the differences in vigorbetween the two species. The relative growth rates for biomass and leaf area were also similar in the two species, although it was achievedin different ways. The average net assimilation rate (NAR) was 25% greater in wheat than in barley in both experiments, whereas the averageleaf area ratio (LAR) was 23% higher in barley. Variation in specificleaf area (SLA) was largely responsible for the variation in NAR and LAR in both the glasshouse and outside. Factors between germination and the appearance of the second main stem leaf must be responsible for the greater early vigor in barley compared with that of wheat.

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Documento generato il 27/11/20 alle ore 07:16:58