7:p4:1.html

(go to NO.7 Contents)

Photosynthetic capacity in green and white leaf portions of an X-ray induced mutant "japonica stripe¹⁾" in Triticum monococcum

K. YAMASHITA. Z. KASAI and K. ASADA

Biological Laboratory, Kyoto Univ., and Research Institute for Food Science, Kyoto Univ., Kyoto, Japan

Leaf blades of "japonica stripe (j)" in T. monococcum has a white (sometimes yellowish) stripe. The authors have studied the difference of photosynthetic capacity between the green and white portions of the striped leaves. After the dark treatment for the starvation of carbohydrates, the leaf blades taken from the maturing plants were exposed to 1% carbon dioxide labelled with radioactive C¹⁴ for an hour, at 25C and under 4000 lux. Each leaf blade was then divided into the green and white portions, and the C¹⁴O₂ fixation was determined by cpm/g dry wt., as given in the following table.

1) Induced by late Dr. L. Smith, who was the Professor of Agronomy, State College of Washington. Pullman, Washington, U.S.A.

(go to NO.7 Contents)