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Xylogliicae‐ and cello‐oligosaccharides: Antagonists of the growth‐promoting effect of H +
Author(s) -
Lorences Ester P.,
McDougall Gordon J.,
Fry Stephen C.
Publication year - 1990
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.1399-3054.1990.tb04382.x
Subject(s) - xyloglucan , chemistry , oligosaccharide , auxin , biochemistry , pisum , fucose , polysaccharide , stereochemistry , glycoprotein , gene
Xyloglucan‐oligosaccharides and cello‐oligosaccharides, both of which are potential products of the action of cellulase on plant cell wail polysaccharides, inhibited acid‐induced elongation in pea ( Pisum sativum L. cv. Alaska) stem segments. Xyloglucan‐derived nonasaccharide (XG9; Glc 4 ‐Xyl 3 )Gal‐Fuc) and decasaccharide (XG10; Glc 4 ‐Xyl 3 ‐Gal 2 ‐Fue) inhibited acid‐induced growth at 1.0 and 0.1 n M , respectively, whereas the heptasaccharide (XG7; Glc 4 ‐Xyl 3 ) and octasaccharide (XG8; Glc 4 ‐Xyl 3 ‐Gal) 2 which lack L‐fucose, did not. XG9 at 1 n M inhibited acid‐induced growth as effectively as it inhibits auxin‐induced elongation. This suggests that XG9's effect as an inhibitor of auxin action is not mediated by a suppresion of H + ‐efflux, but rather that XG9 blocks some step that is common to the action of both auxin and H + on growth. Cello‐oligosaccharides (degree of polymerisation 4–7) also inhibited acid‐induced growth at 10 n M ; these are therefore a new class of possible oligosaccha‐rin. The inhibitory effect of xyloglucan‐ and cellooligosaccharides on acid‐induced growth was rapidly reversed by washing.