Plant Growth, Chlorophyll Content, Leaf Water Potential, Photosynthetic Rates and Gibberellin Bioassay of Capsicum Roots Treated with CPPU

다국어 초록 (Multilingual Abstract)

This experiment was designed to further evaluate the effect of root applied N-(2-chloro-4-pyridyl)-N-phenylurea (CPPU) on plant growth, chlorophyll content, leaf water potential and photosynthetic rate of capsicum plants. The roots of 6-week-old capsicum seedlings were soaked in 2 concentrations (1 or 10 ㎎ㆍL?¹) of CPPU for 2 hours. Root applied CPPU at 10 ㎎ㆍL?¹ treated plants significantly decreased plant height and leaf expansion, and by 3 weeks after CPPU treatment, chlorophyll content of 10 ㎎ㆍL?¹ CPPU was significantly lower than untreated controls. Photosynthetic rates were not affected by CPPU treatment. Leaf water potential of the 10 ㎎ㆍL?¹ CPPU-treated plants was lower than untreated controls, possibly due to a small osmotic adjustment as stomatal resistance and photosynthetic rate were not affected. Xylem sap collected from the roots of CPPU-treated capsicum plants had less detectable gibberellin, possibly associated with blocking of gibberellin biosynthesis.

목차 (Table of Contents)

• Abstract
• Introduction
• Materials and Methods
• Results
• Discussion
• Acknowledgements
• Literature Cited