We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effects of light intensity on photosynthesis and dry matter production of flue-cured tobacco at its seedling stage.
- Authors
Rui Wang; Guo-shun Liu; Guo-hua Chen; De-en Xiang; Yun-ping Wu
- Abstract
Taking flue-cured tobacco Yunyan 87 as test material, this paper studied its photosynthesis and dry matter production at seedling stage under 100% , 88% , 72% , and 62% natural light intensities. At noon of sunny days, 100% natural light intensity inhibited the photosynthesis, while proper shading (88% natural light intensity) could eliminate the inhibition, and the daily photosynthesis was significantly higher than other treatments. Shading reduced the light saturation point and compensation point, enhanced the apparent quantum yield of photosynthesis and the net photo-synthetic rate under weak light, increased the chlorophyll a and chlorophyll b contents, but decreased the chlorophyll a/b and cartenoids contents. Under 88% natural light intensity, tobacco seedlings had higher light saturation point, lower compensation point, higher suitability to the change of light intensity, and higher photosynthetic potentiality. 100% natural light intensity was more advantageous to the transfer of dry matter and soluble sugar to stem, while 88% natural light intensity was more beneficial to the transfer of dry matter and soluble sugar to root. Under the conditions of this experiment, proper shading (88% natural light intensity treatment) could improve the seedling quality of flue-cured tobacco.
- Subjects
PHOTOSYNTHESIS; FLUE-cured tobacco; BRIGHTNESS perception; GERMINATION; SEEDLING quality; CHLOROPHYLL
- Publication
Yingyong Shengtai Xuebao, 2010, Vol 21, Issue 8, p2072
- ISSN
1001-9332
- Publication type
Article