Isoda Laboratory

Outlines of researches Profiles Main researches Published papers 日本語

Improvement of crop production in arid areas Improvement of productivity in leguminous crops Leaf movement Methodology

Leaf movement in leguminous crops and cotton

It is well known that leaves of many species including leguminous plants move during daytime corresponding to the rays of the sun. Leaf movement has two aspects, paraheliotropic (avoiding radiation) and diaheliotropic (intercepting radiation) movement. Leaf movement is closely related to water status of plants and soil, and has functions to improve water use efficiency and to avoid water and heat stress.I am researching the effects of leaf movement of soybean and peanut canopy on radiation interception (radiation penetration into the canopy would be improved in high population density), and analyzing as a avoiding function of water and heat stress under arid conditions.Cotton also moves their leaves with response to radiation. But the way is different from leguminous plants, showing always diaheliotropic movement. I am analyzing the differences between the crops in terms of adaptation mechanisms.

Soybean

Leaf movement under water deficit conditions. Red arrow means sunbeams, leaves move to avoid the sunbeams

Peanut

Leaf movement in peanut (red arrow means sunbeam)

Cotton

Leaf movement in cotton. Leaves always face toward the sun's ray

Phone : +81-47-308-8814

Graduate School of Horticulture, Chiba University

E-mail : isoda@

Dr. Akihiro Isoda

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