Showing papers on "Sensitive-plant published in 1986"
1 Jan 1986
TL;DR: The epidermis is not only an effective filter for UV-B radiation, but is wavelength selective, and shows a degree of plasticity in this attenuation.
Abstract: Effective UV attenuation in the outer leaf layers may represent an important protective mechanism against potentially damaging solar UV-B radiation. Epidermal optical properties for Rumex patientia and Rumex obtusifolius were examined on field collected and greenhouse grown plants. Rumex patientia, a relatively UV-B sensitive plant, has substantially higher epidermal UV transmittance than Rumex obtusifolius, which indicated that the UV-B flux at the mesophyll layer for Rumex patientia would also be higher. Attenuation of UV-B radiation increased in Rumex obtusifolius by 27% after exposure to solar UV-B radiation. Flavonoid extract absorbance also increased in whole leaves of both species after solar UV-B irradiation. The epidermis is not only an effective filter for UV-B radiation, but is wavelength selective, and shows a degree of plasticity in this attenuation.
85 citations
TL;DR: Mesophyll chloroplasts isolated from leaves of the chilling-sensitive C4 plant, Amaranthus lividus, exhibited high rates of light-dependent biosynthetic activities and appears to synthesise highly saturated ‘prokaryotic’ glycerolipids because the chloroplast sn-glycerol-3-phosphate:acyl-acyl carrier protein acyltransferase does not discriminate between palmitoyl- and oleoyl
14 citations
1 Jan 1986
TL;DR: Ozone is a major cause of injury to vegetation in Europe and the USA and injury to a broad spectrum of Gymnosperms and Angiosperms after exposure to low 03 dosages was documented.
Abstract: Ozone is a major cause of injury to vegetation in Europe and the USA. Injury to a broad spectrum of Gymnosperms and Angiosperms after exposure to low 03 dosages was documented. (Feder et al 1969,1970;Gentile et al 1971;Omrod et al 1976;Davis & Wood 1972;Miller et al 1969;and Berry 1973.) Sensitive plant species are injured by 0.04–0.06ppm 03 for 4hr. Petunia, tobacco, potato, and morning glory and tree species like white pine and ponderosa pine were in this 03-sensitive group. (Feder 1970; Miller et al 1969;Berry 1973.) Sensitivity to 03 varies among CVs and within species. Variability of 03 response was noted for corn (Cameron et al 1970) ;tomato (Gentile et al 1971) ;bean (Davis & Kress 1974) ;Petunia (Feder et al 1969) ;alfalfa (Howell et al 1971); white pine (Berry 1973);Ponderosa pine (Miller et al 1969) ;and forest trees (Jensen 1973.)
13 citations
TL;DR: The results do not agree with a previous proposal that calcium and calmodulin play a key role in regulating higher plant lysine‐sensitive aspartate kinase.
11 citations