Journal ArticleDOI
The Relationship between Absorption of Sulfur Dioxide(SO2)and Inhibition of Photosynthesis in Several Plants
TLDR
Calculation of diffusive resistance to H2O(r) and SO2(r′) showed that the ratio of r′/r was 1.9 irrespective of species and coincided well with the theoretical value based on molecular diffusion, making clear that the absorption of SO2 was dependent upon the gas exchange capacity of leaf blade.Abstract:
Photosynthetic rate, transpiration rate and SO2 absorption rate were simultaneously measured under exposure to SO2 (0.1–1.0 μl l
−1) for 5 or 8 hr in six species belonging to C4 or C3 plants (Zea mays, Sorghum vulgare, Amaranthus tricolor, Oryza sativa, Avena sativa andHelianthus annuus). Distinct interspecific differences were found as to the extent of inhibition of photosynthetic rate. Calculation of diffusive resistance to H2O(r) and SO2(r′) showed that the ratio of r′/r was 1.9 irrespective of species and coincided well with the theoretical value based on molecular diffusion. Thus it was made clear that the absorption of SO2 was dependent upon the gas exchange capacity of leaf blade. Using the ratio of r′/r the rate of SO2 absorption could be calculated from transpiration rate and was compared with the inhibition rate of photosynthesis. In three C4 species, the inhibition of photosynthesis increased linearly with the amount of SO2 absorbed during a 5-hour period. The pattern of inhibition of photosynthesis inA. sativa andH. annuus among C3 species was similar to that of C4 species until the amount of SO2 absorbed reached 60 mg-SO2 m−2 above which the inhibition abruptly increased. The inhibition of photosynthesis inO. sativa was exceptionally severe even with only a small amount of SO2 absorbed.read more
Citations
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Book ChapterDOI
Effects on Photosynthesis, Carbon Allocation, and Plant Growth Associated With Air Pollutant Stress
TL;DR: The NCLAN effort has clearly identified the need for additional information in the form of dose—response data concerning the interaction of air pollutants with other environmental variables and the need to establish the functional relationships between air pollution stress and plant growth and yield.
Book ChapterDOI
Effects of vegetation: native, crops, forests
TL;DR: In this article, the authors present an update of research on the effects of air pollutants on vegetation and discuss the primary data base for the two pollutants of primary concern to terrestrial ecosystems, ozone and sulfur dioxide.
Journal ArticleDOI
Ramalina ecklonii as a bioindicator of atmospheric pollution in argentina
Adolfo G. Levin,Maria L. Pignata +1 more
TL;DR: The lichen Ramalina ecklonii was transplanted to 24 biomonitoring sites along three transects in the western area of Cordoba, Argentina, and tested for chlorophyll, phaeophytin conjugated dienes concentration, soluble protein content, and sulfur accumulation.
Journal ArticleDOI
Impact of ambient air pollution on locally grown rice cultivars (Oryza sativa L.) in Malaysia
TL;DR: In this paper, the first experimental evidence of the sensitivity of rice plants to ambient air pollution from the Southeast Asian tropical region was presented, where two widely adopted local cultivars of rice (Oryza sativa L.), MR84 and MR185, were grown in open top chambers ventilated with charcoal-filtered air and non filtered air, and in adjacent open plots on the campus of University Putra Malaysia.
Journal ArticleDOI
Amelioration of Indian urban air pollution phytotoxicity in Beta vulgaris L. by modifying NPK nutrients.
TL;DR: It is proved that ambient air pollution of Allahabad city is influencing negatively to the growth and yield of palak plants and the increased fertilizer application over the recommended dose resulted in a positive response by reducing losses in photosynthetic pigments and total biomass.
References
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Responses of plants to environmental stresses
TL;DR: In this article, the authors investigated the responses of plants to environmental stresses and found that plants respond to environmental stress in response to various types of stressors, such as drought and flooding.
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Principles of Environmental Physics
TL;DR: In this paper, the second edition of the Second edition, the authors present a list of symbolic symbols for the field of environmental physical sciences, including the following: 1.GAS LAWS Pressure, volume and temperature Specific heats Lapse rate Water and water vapour Other gases 3. TRANSPORT LAWS General transfer equation Molecular transfer processes Diffusion coefficients Radiation laws 4. RADI ENVIRONMENT Solar radiation Terrestrial radiation Net radiation 5. MICROCLIMATOLOGY OF RADIATION (i) Interception Direct solar radiation Diffuse radiation Radiation in
Journal ArticleDOI
The effect of atmospheric humidity on photosynthesis, transpiration and water use efficiency of leaves of several plant species.
TL;DR: The effect of humidity on the gas exchange of leaves of the dicotyledons soybean, sunflower, jojoba, and saltbush and of whole, attached, single leaves showed that water use efficiency was highest in the C4 xerophytes and lowest in theC3 mesophytes.
Journal ArticleDOI
Die mikroanalytische Schnellbestimmung von Halogenen und Schwefel in organischen Verbindungen
TL;DR: In this paper, a Verbrennungsmethode is beschrieben, um auf einfachste Weise in kurzer Zeit den Halogenbzw- Schwefelgehalt organischer Verbindungen bestimmen zu konnen.
Journal ArticleDOI
Biochemical basis for plant competition
C.C. Black,T. M. Chen,R.H. Brown +2 more
TL;DR: A hypothesis has been developed that efficient plants often have been used in agriculture because of their high production, but efficient plants also are very competitive and the observation has been made that almost all weeds which have been tested are members of the efficient groups of plants.