Premium
Relationships between auxin‐ and acid‐induced growth in Vigna radiata hypocotyl segments
Author(s) -
Prat Roger,
Goldberg Renee
Publication year - 1984
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.1399-3054.1984.tb06099.x
Subject(s) - hypocotyl , vigna , radiata , auxin , botany , proton , biophysics , chemistry , biology , biochemistry , physics , quantum mechanics , gene
The H + ‐ and IAA‐induced growth responses of isolated Vigna radiata (L.) Wilczek hypocotyl segments were investigated concurrently with IAA‐induced H + excretion. The effects of external pH on these reactions were also studied. Experiments were performed with intact, peeled and abraded segments. Only abraded segments reacted to H + and to IAA. In short‐term experiments, the cuticle prevented proton efflux and influx; however, it allowed gradual ion movements which become measurable after 1 h. Both phases of the IAA growth response reacted to external pH. The interactions between these two phases and their pH dependencies are discussed.