title: Rates of ethylene release, photosynthesis and transpiration of rice measured in closed-type chamber.
abstract: To obtain the basic data of gas exchange of rice (Oryza sativa L. cv. Nipponbare), rates of ethylene release, photosynthesis and transpiration of the rice plant were measured by using a closed-type chamber. Each rate increased until the heading stage and thereafter decreased. Ethylene release rate (E) gradually increased with day after seeding and rates of photosynthesis (P) and transpiration (T) did exponentially. At the heading stage, E, P and T were maximum and had values of about 2.0 mmol plant-1 h-1, 3.0 mmol plant-1 h-1 and 0.60 mol plant-1 h-1, respectively. E in the light period was 1.5-3 times as much as that in the dark period, whereas T in the light period was 5-6 times as much as that in the dark period. E of rice per plant was lower than those of lettuce and Brassica genera which were reported previously. Especially, the rate of rice was about one-tenth that of lettuce. However, when ethylene release rates were estimated on a growth area basis, the rate of rice was about half that of lettuce, and was more than those of Brassica genera.
authors.affiliation: College of Agriculture, Osaka Perfecture University, Sakai, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Saito
authors.forename: A
authors.initials: A
authors.lastname: Tani
authors.forename: M
authors.initials: M
authors.lastname: Kiyota
authors.forename: M
authors.initials: M
authors.lastname: Ohe
authors.forename: H
authors.initials: H
authors.lastname: Sato
mesh_terms: D018504:Ecological Systems, Closed; D004780:Environment, Controlled; D005030:Ethylenes / Q000378:metabolism* / Q000528:radiation effects; D008021:Life Support Systems; D008027:Light; D012275:Oryza / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D010788:Photosynthesis; D010937:Plant Growth Regulators / Q000378:metabolism* / Q000528:radiation effects; D018526:Plant Transpiration; D013997:Time Factors
chemical_list: D005030:Ethylenes; D010937:Plant Growth Regulators; C036216:ethylene