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Salt tolerance in the halophyte suaeda maritima interaction between aluminum and salinity



Salt tolerance in the halophyte suaeda maritima interaction between aluminum and salinity



Annals of Botany 41(172): 331-340



Growth of Suaeda maritima was stimulated by low Al concentrations in saline solution culture with an increase in the number and extent of lateral roots. Under non-saline conditions the same Al concentrations inhibited growth and led to an abnormal lateral root initiation. Increasing the level of Al led to growth inhibition under both culture conditions. Salinity reduced the uptake of Al into plant tissue, and there was no evidence that Al was tolerated internally. Although short-term 32P influx was increased by Al there were no long-term effects of significance on levels of Na, K, Ca nor P in the shoots. The results are discussed in relation to proposed mechanisms of Al toxicity and the interaction between Al and salt toxicities. An explanation is proposed for both stimulatory and inhibitory effects of Al as a quantitative expression of a single primary effect upon the root system.

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Accession: 006361826

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