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Autoinhibition of indoleacetic acid transport in the shoots of two‐branched pea ( Pisum sativum ) plants and its relationship to correlative dominance
Author(s) -
Li ChunJian,
Bangerth Fritz
Publication year - 1999
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 - 10.1034/j.1399-3054.1999.106409.x
Subject(s) - pisum , epicotyl , sativum , apical dominance , auxin , shoot , biology , botany , elongation , dominance (genetics) , germination , horticulture , biochemistry , gene , materials science , ultimate tensile strength , metallurgy
Two‐branched pea plants ( Pisum sativum L. cv. Lisa ZS) with different dominance degrees, obtained by removing the epicotyl shortly after germination, were used to study the interaction between the polar transport of indoleacetic acid (IAA) in both branches of the plants and its relationship to correlative dominance. The dominant shoot had higher transport capacity for C‐IAA applied to the cut stump of one side of the Y‐form explant was used, the stronger the H‐IAA transport was inhibited and the more the transported IAA was conjugated above the junction on the other side. The results of these experiments support the autoinhibition hypothesis at junctions. The relationship between elongation growth and IAA export/transport in the two‐branch pea plants is considered.