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Start Over Coverage 105-116

2. Micro-ecology and some related aspects of C4 plants living in Europe

Creator:
Mateu-Andrés, I.
Format:
print
Type:
model:internalpart and TEXT
Language:
Multiple languages
Description:
The number of C4 plants living in Europe is increased to 120, and data on geographic origin, metabolic subtype, microecology and biotype, are given and compared with previous data. Our data agree with current ideas regarding the origin and biotype of the C4 plants, and only partially regarding ecology. At present, many C4 plants grow on disturbed sites or in stressed conditions, but ťhere is a lesser number of xerophytes than is currently thought and, conversely, some of them grow in favourable conditions. Among the latter mentioned, hydrophytic plants stand out because of their relatively great number and originality, as well as because no previous work on the ecology of C4 plants has indicated this.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. On maximal monotone operators with relatively compact range

Creator:
Zagrodny, Dariusz
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
nonlinear operators, maximal monotone operators, range of maximal monotone operator, and an approximation method of maximal monotone operators
Language:
English
Description:
It is shown that every maximal monotone operator on a real Banach space with relatively compact range is of type NI. Moreover, if the space has a separable dual space then every maximally monotone operator $T$ can be approximated by a sequence of maximal monotone operators of type NI, which converge to $T$ in a reasonable sense (in the sense of Kuratowski-Painleve convergence).
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

5. Response of photosynthesis and chlorophyll fluorescence to acute ozone stress in tomato (Solanum lycopersicum Mill.)

Creator:
Thwe, A. A., Vercambre, G., Gautier, H., Gay, F., Phattaralerphong, J., and Kasemsap, P.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
fotosyntéza, ozon, rajčata, fyziologie rostlin, photosynthesis, ozone, tomatoes, plant physiology, sensitivity to ozone, 2, and 581
Language:
Multiple languages
Description:
The crop sensitivity to ozone (O3) is affected by the timing of the O3 exposure, by the O3 concentration, and by the crop age. To determine the physiological response to the acute ozone stress, tomato plants were exposed to O3 at two growth stages. In Experiment I (Exp. I), O3 (500 μg m-3) was applied to 30-d-old plants (PL30). In Experiment II (Exp. II), three O3 concentrations (200, 350, and 500 μg m-3) were applied to 51-d-old plants (PL51). The time of the treatment was 4 h (7:30-11:30 h). Photosynthesis and chlorophyll fluorescence measurements were done 4 times (before the exposure; 20 min, 20 h, and 2-3 weeks after the end of the treatment) using a LI-COR 6400 photosynthesis meter. The stomatal pore area and stomatal conductance were reduced as the O3 concentration increased. Ozone induced the decrease in the photosynthetic parameters of tomato regardless of the plant age. Both the photosystem (PS) II operating efficiency and the maximum quantum efficiency of PSII photochemistry declined under the ozone stress suggesting that the PSII activity was inhibited by O3. The impaired PSII contributed to the reduced photosynthetic rate. The greater decline of photosynthetic parameters was found in the PL30 compared with the PL51. It proved the age-dependent ozone sensitivity of tomato, where the younger plants were more vulnerable. Ozone caused the degradation of photosynthetic apparatus, which affected the photosynthesis of tomato plants depending on the growth stage and the O3 concentration., A. A. Thwe, G. Vercambre, H. Gautier, F. Gay, J. Phattaralerphong, P. Kasemsap., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public