IBIS-Flora

Angiosperm Flora of India

Carbohydrates Accumulation and Remobilization in Wheat Plants as Influenced by Combined Waterlogging and Shading Stress During Grain Filling

Publication Type:Journal Article
Year of Publication:2013
Authors:LI, H, Cai, J, Jiang, D, LIU, F, Dai, T, Cao, W
Journal:Journal of Agronomy and Crop Science
Volume:199
Issue:1
Date Published:2013
ISBN Number:1439-037X
Keywords:fructans, fructans-catalysing enzymes, stem reserves remobilization, Triticum, wheat (Triticum aestivum L.)
Abstract:

Wheat plants were subjected to combined waterlogging and shading stress (WS) at 0–7, 8–15, 16–23 and 24–31 days after anthesis (DAA), respectively. Compared to the non-stressed plants, WS significantly decreased the final grain yield. Grain number was dramatically lowered by WS imposed at 0–7 DAA but hardly affected by other WS treatments; while the thousand-kernel-weight was unaffected by WS imposed at 0–7 DAA and lowered by other WS treatments. Photosynthate accumulation in the stem was decreased by WS imposed at 0–7 and 8–15 DAA, but was unaffected by WS imposed at later stages. Grain-filling rate was decreased, although the apparent remobilization of carbohydrate reserves from stem to grain was stimulated under WS. The carbohydrate reserves stored in the lower stem internodes were activated earlier and remobilized much more than those in the upper internodes; however, the proportion of the apparent remobilized reserves among the different stem internodes was consistent for all treatments. WS decreased contents of fructans, fructose and sucrose in the stem, which coincided with increased activity of fructan exohydrolase and decreased activities of sucrose-1-fructosyltransferase and fructan-1-fructosyltransferse. The results indicate that post-anthesis WS stimulated carbohydrate reserves remobilization by modifying the activities of the fructans-catalysing enzymes in the stem.

URL:http://dx.doi.org/10.1111/j.1439-037X.2012.00532.x
Short Title:Journal of Agronomy and Crop Science
Taxonomic name: 
Fri, 2014-01-24 18:13 -- admin
https://secure.gravatar.com/avatar/5ade1b012674ce3dd941e2ea5dd15cc1.jpg?d=https%3A//flora.indianbiodiversity.org/sites/all/modules/patches/contrib/gravatar/avatar.png&s=100&r=G
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith