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Titolo:
The effect of soil moisture on the tolerance of Lupinus pilosus genotypes to a calcareous soil
Autore:
Brand, JD; Tang, C; Graham, RD;
Indirizzi:
Univ Adelaide, Dept Plant Sci, Glen Osmond, SA 5041, Australia Univ Adelaide Glen Osmond SA Australia 5041 en Osmond, SA 5041, Australia Univ Western Australia, CLIMA Soil Sci & Plant Nutr, Nedlands, WA 6907, Australia Univ Western Australia Nedlands WA Australia 6907 nds, WA 6907, Australia
Titolo Testata:
PLANT AND SOIL
fascicolo: 1-2, volume: 219, anno: 2000,
pagine: 263 - 271
SICI:
0032-079X(2000)219:1-2<263:TEOSMO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
IRON CHLOROSIS; BICARBONATE; DEFICIENCY; RESISTANCE; CHLOROPHYLL; EXTRACTION; CULTIVARS; ALBUS; WHEAT; BORON;
Keywords:
bicarbonate soil moisture; calcium carbonate; iron chlorosis; lupin;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Brand, JD Univ Adelaide, Dept Plant Sci, PMB 1, Glen Osmond, SA 5041, Australia Univ Adelaide PMB 1 Glen Osmond SA Australia 5041 041, Australia
Citazione:
J.D. Brand et al., "The effect of soil moisture on the tolerance of Lupinus pilosus genotypes to a calcareous soil", PLANT SOIL, 219(1-2), 2000, pp. 263-271

Abstract

Commercial narrow-leafed lupins (Lupinus angustifolius L.) grown on calcareous soils commonly display chlorotic symptoms resembling Fe deficiency. The severity of chlorosis increases with concurrent increases in soil moisture content. Our research has indicated that the rough-seeded lupin species, Lupinus pilosus Murr., has a range of adaptation to calcareous soils, from tolerant to intolerant. A pot experiment was conducted comparing a tolerant, a moderately tolerant and a moderately intolerant genotype of L. pilosus. Plants were grown for 35 days in a calcareous soil (50% CaCO3) at three moisture contents (80%, 100% and 120% of field capacity); the growth was compared with that on a fertile black cracking clay control soil at 70% of field capacity. Visual chlorosis score, chlorophyll meter readings, number of leaves and shoot dry weights were recorded at 14, 21, 28 and 35 days after sowing. Concentrations of chlorophyll, active Fe and nutrients in the youngest fully expanded leaves were also measured. Results showed that increased soil moisture increased the severity of chlorotic symptoms (increased chlorosis score) in all genotypes. The tolerant genotype showed significantly less symptoms than other genotypes at all moisture contents. All genotypes were able to recover from chlorosis symptoms at 80% moisture in the calcareous soil. Chlorosis score negatively correlated with chlorophyll meter readings, chlorophyll concentration and foliar active and total Fe, and Mn concentrations. Visual chlorosis score appeared to be a cost effective, accurate and efficient method enabling classification of the tolerance of genotypes. The chlorotic symptoms were likely to be due to HCO3- induced nutrient deficiencies or a direct effect of HCO3- on chlorophyll synthesis. This study indicates that the most probable mechanism of tolerance is related to an ability to prevent uptake of HCO3- or efficiently sequester it once inside the root which prevents increases in internal pH and transport to the shoots.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:15:54