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Long‐term effects of plant hormones on K + levels and transport in young wheat plants of different K + status
Author(s) -
Dhakal Min Raj,
Erdei László
Publication year - 1986
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1986.tb03408.x
Subject(s) - abscisic acid , shoot , gibberellic acid , chromosomal translocation , ethylene , hormone , chemistry , selectivity , botany , horticulture , biology , biochemistry , germination , gene , catalysis
Long‐term effects of 1‐naphtaleneacetic acid (NAA), benzyladenine (BA), gibberellic acid (GA 3 ), abscisic acid (ABA) and ethylene on K + levels, K + uptake and translocation to the shoot were studied in young wheat plants ( Triticum aesticum L. cv. Martonvásári‐8) grown at different K + supplies. Na + levels and K + /Na + selectivity were also investigated. Both in shoots and roots, NAA, BA and ABA decreased K + and Na + levels more effectively in high‐K + plants than in low‐K + plants. GA, and ethylene did not influence K + and Na + levels. K + /Na + selectivity in roots of low‐K + plants was increased in favour of K + by BA, NAA and to a lesser extent by ABA. In high‐K + plants only BA increased the K + /Na + ratio, whereas the effects of the other hormones were the opposite (NAA) or less pronounced (ABA). K + ( 86 Rb) uptake was inhibited by NAA and BA in low‐K + plants but not in high‐K + plants. K + ( 86 Rb) uptake was inhibited throughout by 10 μ M ABA. K + ( 86 Rb) translocation to the shoot was influenced by the hormones similarly to the uptake patterns, with the exception of ABA, which inhibited translocation in low‐K + plants but not in high‐K + plants. The results show that hormonal effects may quantitatively and qualitatively be modified by K + levels in the plant and that internal K + concentration may play a role in the mechanisms regulating the effects of NAA, BA and ABA but probably not in those of GA 3 or ethylene.