Journal article
Some responses of ladino clover (Trifolium repens L. cv. Regal) to low concentrations of sulphur dioxide
New Phytologist, Vol.100(1), pp.57-62
1985
Abstract
Ladino clover (Trifolium repens L. cv. Regal) was exposed to mean SO2 concentrations of 215, 78 or 2.8 μg m−3† in open top fumigation hambers for up to 175 d. Exposure to 215 μg m−3 for 28 d significantly increased leaf area and number of leaves per plant, and exposure to 78 μg m−3 significantly reduced the shoot: root ratio, and increased the leaf area ratio, compared with control plants exposed to 2.8 μg m−3. Exposure to 215 or 78 μg m−3 had no significant effect on shoot or root weight, and all other effects had decreased beyond the level of statistically significant differences between treatment and control after 63 d of fumigation.
Exposure to SO2 for 175 d had no effect on leaf protein concentration but exposure to 215 or 78 μg m−3 significantly reduced the concentrations of L-ascorbic acid and starch in leaves, and increased the sulphur concentrations in the shoot. The specific energy of leaves was not significantly changed by 78 μg m−3 but was significantly increased by exposure to 215 μg m−3 of SO2 for 28 d and significantly decreased by the same concentration after 175 d. Exposure to SO2 for 175 d had no significant effect on the specific energy of shoots. The SO2-induced reduction in ascorbic acid concentration may suggest a mechanism for reduced freezing resistance in plants exposed to SO2.
Details
- Title
- Some responses of ladino clover (Trifolium repens L. cv. Regal) to low concentrations of sulphur dioxide
- Authors/Creators
- F. Murray (Author/Creator) - University of Newcastle Australia
- Publication Details
- New Phytologist, Vol.100(1), pp.57-62
- Publisher
- Blackwell Publishing
- Identifiers
- 991005546023607891
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.40 Forestry
- 3.40.1396 CO2 and Ozone Effects
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science