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Titolo:
RELATIONSHIP BETWEEN WATER-RETENTION CAPABILITY AND OSMOTIC ADJUSTMENT IN SORGHUM (SORGHUM-BICOLOR) GROWN UNDER DROUGHT STRESS
Autore:
ASHRAF M; AHMAD MM;
Indirizzi:
51 C SHEIKH COLONY,ABC RD FAISALABAD PAKISTAN BAHAUDDIN ZAKARIYA UNIV,INST PURE & APPL BIOL MULTAN PAKISTAN
Titolo Testata:
Arid soil research and rehabilitation
fascicolo: 3, volume: 12, anno: 1998,
pagine: 255 - 262
SICI:
0890-3069(1998)12:3<255:RBWCAO>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
OSMOREGULATION; RESISTANCE; WHEAT; TOLERANCE; PLANTS;
Keywords:
DROUGHT CYCLES; DROUGHT STRESS; OSMOTIC ADJUSTMENT; WATER-RETENTION CAPABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
M. Ashraf e M.M. Ahmad, "RELATIONSHIP BETWEEN WATER-RETENTION CAPABILITY AND OSMOTIC ADJUSTMENT IN SORGHUM (SORGHUM-BICOLOR) GROWN UNDER DROUGHT STRESS", Arid soil research and rehabilitation, 12(3), 1998, pp. 255-262

Abstract

Drought resistance of two drought-resistant lines, GP12.1C 1039 and GP.20 Bagdar, and two drought-sensitive lines, GPD11 YSS.89 and GP17.S.35, of sorghum was assessed in a pot experiment under glasshouse conditions. Twenty-eight-day-old plants of these four lines were subjected to repeated drought cycles for 15 days. The drought-resistant lines were superior to the drought-sensitive lines in biomass production and leaf area under drought stress. The drought treatment caused a significant reduction in leaf osmotic potential in all four lines. A close relationship between drought resistance and osmotic adjustment was observed in these lines differing in drought resistance. For instance, the two drought-resistant lines had significantly higher osmotic adjustment(0.469 and 0.496 MPa) than that of the two drought-sensitive lines (0.428 and 0.310 MPa). By contrast, a negative relationship between drought resistance and water retention capability (determined as decrease in weight of excised leaves during 5-hour drying period) was found in all four lines, since the two drought-resistant strains had relativelylower water retention capability than the two drought-sensitive lines. Since there was a negative relationship between water-retention capability and osmotic adjustment, water-retention capability cannot be used as a reliable selection criterion for identification of drought-resistant genotypes/lines in sorghum.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/05/20 alle ore 12:45:50