2008•Unpublished venueRequires access
Photosynthesis, Chlorophyll Contents and Leaf Characteristics of Ilex rotunda under Different Shading Treatments
Jingyu Han, Seog-Gu Son, Sea-Hyun Kim, Chansoo Kim, Suk-In Hwang, Kwang-Ok Byun
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Abstract
Two-year-old seedlings of Ilex rotunda were grown under control (full sunlight) and three different shading condition. Those conditions were full sunlight (PPFD 1600μ mol m -2 s -1 ), 30% (PPFD 400μ mol m -2 s -1 ), 50% (PPFD 250μ mol m -2 s -1 ) and 70% treatment (PPFD 100μ mol m -2 s -1 ). Total chlorophyll contents were inverse proportion to light intensity. Seedlings under full sunlight showed the highest photosynthetic activity such as photosynthetic rate, intercellular CO2 concentration and water use efficiency. Photosynthetic activity trend was increased at the higher light intensity than the lower treatment over PPFD 500μ mol m -2 s -1 . Especially, seedlings under 70% treatment showed the worst photosynthetic activity at high light intensity. That result was regular for adapted plant in low intensity environment. Leaf area was also inverse proportion to light intensity, while dry weight per leaf area was shown the opposite trend.