|Title:||A Preliminary Note on the Photosyn Thetic Rate of I-Geo-Gen Leaf in Relation to the Red Discoloration under Low Temperature||Other Titles:||低溫與矮腳尖葉片之紅化及其對光合成速率之影響-預報||Authors:||S. Lian
|Issue Date:||4-Sep-1972||Publisher:||農業試驗所||Journal Volume:||21||Journal Issue:||3||Start page/Pages:||187-190||Source:||農業研究||Abstract:||
To test if the red discoloration of leaves usually observed in I-geo-gen is related to low temperature and also if the photosynthetic rate and the grain yield are adversely affected by the discoloration, a pot experiment was conducted.
Rice varieties, I-geo-gen and Yükara, were grown in a greenhouse at 25-40°C. At about maximum tillering stage, two temperature treatments, i.e., 13-20°C and 25-40°C (normal) were differentiated. These pots were returned to the normal temperature after eleven-day treatments. The apparent photosynthetic rate was then measured on certain intact leaves to see the effect of temperature treatment.
Significant red discoloration of leaves and also a decrease of apparent photosynthetic rate were observed in J-geo-gen after the low temperature treatment, whereas there was no such phenomenon in Yãkara.
It is suggested that low temperature causes more decrease in the grain yield due to the discoloration of leaves which accompanies a decrease of photosynthetic rate of leaves in indicas than japonicas.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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