Premium
Involvement of soluble proteinous factors in auxin‐induced modulation of P‐type ATPase in rice ( Oryza sativa L.) seedlings
Author(s) -
Kim Donghern,
Kim Yong-Sam,
Jung Jin
Publication year - 1997
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/s0014-5793(97)00527-9
Subject(s) - auxin , oryza sativa , chemistry , gene isoform , shoot , atpase , stimulation , hormone , enzyme , botany , biochemistry , horticulture , biology , endocrinology , gene
The marked difference in auxin sensitivity between plant roots and shoots was studied in terms of auxin‐induced stimulation of membrane P‐type ATPase. The results suggest the existence in rice seedlings of, at least, two isoforms of soluble proteinous factors (SPF), SPF I and SPF II , which are involved in the stimulatory action of auxin on the enzyme. It also is indicated that SPF I which mediates the auxin effect in low hormone concentration range (10 −10 –10 −7 M IAA) is the dominant isoform in roots, whereas SPF II which does in high hormone concentration range (10 −7 –10 −4 M IAA) is that in shoots.