Ozone-induced reductions in below-ground biomass: an anatomical approach in potato

Potato plants were grown in open-top chambers under three ozone concentrations during two complete cropping seasons (93 and 77 d in 2004 and 2005, respectively). The effects of chronic exposure to ozone on leaf anatomy, cell ultrastructure and crop yield were studied. Severe cell damage was found, e...

Full description

Saved in:
Bibliographic Details
Published in:Plant, cell and environment cell and environment, 2010-07, Vol.33 (7), p.1070-1083
Main Authors: ASENSI-FABADO, AMPARO, GARCÍA-BREIJO, FRANCISCO J, REIG-ARMIÑANA, JOSÉ
Format: Article
Language:English
Subjects:
Air Pollution - adverse effects
assimilate partitioning
Biological and medical sciences
Biomass
callose
crop yield
Crops, Agricultural - drug effects
Crops, Agricultural - growth & development
Fundamental and applied biological sciences. Psychology
leaf anatomy
open-top chambers
ozone
Ozone - pharmacology
Plant Leaves - cytology
Plant Leaves - ultrastructure
Plant Tubers - drug effects
Plant Tubers - growth & development
potato
potatoes
Solanum tuberosum - cytology
Solanum tuberosum - drug effects
Solanum tuberosum - growth & development
starch
Starch - analysis
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Potato plants were grown in open-top chambers under three ozone concentrations during two complete cropping seasons (93 and 77 d in 2004 and 2005, respectively). The effects of chronic exposure to ozone on leaf anatomy, cell ultrastructure and crop yield were studied. Severe cell damage was found, even at ambient ozone levels, mainly affecting the spongy parenchyma and areas near the stomata. Damage to the cell wall caused loss of cell contact, and loss of turgor pressure due to tonoplast disintegration, contributed to cell collapse. Phloem sieve plates were obstructed by callose accumulation, and damaged mesophyll cells increased their starch stores. Tuber yield fell sharply (24-44%), due to the biggest tubers becoming smaller, which affected commercial yield. These anatomical findings show the mechanisms of ozone effect on assimilate partitioning, and thus crop yield decrease, in potato. Further implications of ozone causing reductions in below-ground biomass are also discussed.
ISSN:0140-7791
1365-3040
DOI:10.1111/j.1365-3040.2010.02128.x