Journal of Experimental Botany, Vol 49, 2013-2018, Copyright © 1998 by Oxford University Press
O Abdin, X Zhou, B Coulman, D Cloutier, M Faris and D Smith
Over the past half decade several stem injection methods have been
developed for cereal plants. These methods allow researchers to administer
solutions to cereal plants to study their effects on plant physiology.
However, little work has been done to extend this technique to non-cereals
An experiment was conducted to test an injection technique that could be
suitable for soybean plants (Glycine max [L.] Merr,),
and to study the effect of long-term injection of sucrose on the growth of
soybean plants. An injection set-up comprising a supporting stand and a
fluid injection system was established. Pressure was applied to the plunger
of a 5 ml syringe using ceramic bricks to force test solutions into the
plants. Solutions of 0, 150, and 300 g sucrose l-1
were injected into soybean plants for 8 weeks starting at the seedling VC
stage. Distilled water had the greatest uptake rate, followed by the 150,
and then the 300 g sucrose l-1 solutions. The
overall average uptake during the injection period was 77.3 ml. Average
sucrose uptake values were 11.8 and 13.5 g per plant for the 150 and 300 g
sucrose l-1 treatments. This represented
approximately 65% of the total dry weight of the plants. Sucrose injection
increased leaf area and pod number relative to the control plants. Nodule
numbers were lower for sucrose injected treatments, but their dry weights
were higher than the control. Above-soil dry matter was higher for the
plants injected with 300 g sucrose l-1 than those
injected with water. The injection system tested was able to administer
concentrated solutions into soybean plants for most of their period of
growth and development. The sucrose supplementation had positive effects on
soybean growth but suppressed photosynthesis.Key
words: Soybean, sucrose, injection.
ARTICLES
Effect of sucrose supplementation by stem injection on the development of soybean plants
Plant Science Department, Macdonald Campus of McGill University, 21111 Lakeshore Road, Ste Anne de Bellevue, Quebec, H9X 3V9, Canada; Agriculture and Agri-Foods Canada, Saskatoon Research Centre, 107 Science Place, Saskatoon, Saskatchewan, Canada S7N 0X2; Agriculture and Agri-Foods Canada, St Jean Sur Richelieu Research Station, Quebec, Canada; Corresponding author e-mail: DSmith@agradm.Ian.mcGill.ca
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