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Photosynthesis takes place in all plants that contain chlorophyll.

In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis.

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#42 Effect of Temperature on the Rate of Photosynthesis

Our results are contradictory with our hypothesis, based on our statistical results. There were several problems with our experiment that could have been taken into consideration. First, when taking respiration rates the foil wasn’t covering the chamber all the way letting some external light in. Second, the colored cellophane only allows approximately 70% of light through; this might have prevented the plant from absorbing the amount of light energy needed to have a significant photosynthetic rate. Third, the fast paced moving between trials lost time and efficiency. By having short trials (2.5 min.) we might not have allowed the plant enough time to adjust its photosynthetic rate to the different wavelengths of light energy. Plus by moving the plant, and switching from cellophane to foil (or vise versa), might have screwed up the photosynthetic cycle by exposing it to white light.

Does Temperature Affect the Rate of Photosynthesis in Elodea estará disponible el

Silaev AA (1984) [Experimental determination of the maximum permissible concentration of sodium perborate in workplace air.] Gig Tr Prof Zabol, 6: 44 (in Russian with French translation).

When the temperature rises the rate of photosynthesis rises ..

f) A modern rat reproduction study to determine the potential for developmental effects of borates in succeeding generations in a sensitive animal species.

The initial symptoms of boron toxicity in plants are chlorosis, necrosis, and a subsequent loss of photosynthetic capacity, which reduces plant productivity.

the Effect of Temperature on the Rate of Photosynthesis in Elodea.

Other effects, such as reproductive toxicity, also occur at slightly higher doses and were considered in the choice of critical effects through a comparison of LOAELs (Table 17) or benchmark doses (BMDs) (Moore et al., 1997).a Several developmental effects from boron exposure have been noted in rats, mice, and rabbits.

Species of maple (Acer sp.) appeared to be the most sensitive, with slight necrosis occurring at a concentration of 432 µg/g in unwashed foliage, moderate necrosis at foliar concentrations ranging from 707 to 1013 µg/g, and severe necrosis at foliar concentrations of 1207-1560 µg/g.

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  • The effect of temperature on photosynthesis - …

    Three factors can limit the speed of photosynthesis: light intensity, carbon dioxide concentration and temperature.

  • The effect of temperature on photosynthesis 1

    In this experiment we were told that we would be measuring the rate of photosynthesis.

  • Does Temperature Affect the Rate of Photosynthesis in Elodea

    If it gets too cold, the rate of photosynthesis will decrease. Plants cannot photosynthesise if it gets too hot.

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Factors Affecting The Rate Of Photosynthesis - …

(1981) found that concentrations of 16, 24, and 32 mg boron/kg soil resulted in a decline in plant development, yellowing of leaves, late flowering, reduction of mitotic frequency in root tip cells, and abnormalities during meiosis in the poppy (Papaver somniferum). Kluge & Podlesak (1985) found that symptoms due to boron excess begin to develop on the leaves (leaf tip necroses) of pot-grown spring barley (Hordeum vulgare) as soon as the boron content of the leaf tissue reaches 60-80 mg/kg dry weight.

Investigation into the Factors Affecting The Rate Of Photosynthesis

At 10.0 mg boron/litre, a slight yellowing of the tips of the needles developed, followed by browning and drying at 20.0 mg/litre, until all plants died at 40.0 mg/litre.

Factors affecting the rate of photosynthesis

Approximately 82% of the plants exhibited the best growth at concentrations from trace to 5 mg/litre, and 35% of the plants grown in trace boron levels developed morphological symptoms of deficiency.

RE: How does temperature effect the rate of photosynthesis

In studies with sea urchin (Anthocidaris crassispina) embryos, exposure to boric acid at a concentration of 37 mg boron/litre had no effect on development, whereas exposure to 75 mg boron/litre was fatal (Eisler, 1990).

#41 Effect of Light intensity on the rate of Photosynthesis

Boron toxicity symptoms in the leaves of Phragmites australis arose first at leaf boron concentrations of around 150-180 mg/kg dry weight; however, no adverse effects on growth, development, or dry substance yields of the plants could be established at these leaf boron concentrations.

Rate of Photosynthesis in Pond-Weed :: Papers

9.1.2 Aquatic organisms Plants Nobel (1981) studied the effect of several boron compounds on photosynthesis in submerged macrophytes, watermilfoil (Myriophyllum alterniflorum), buttercup (Ranunculus penicillatus), and waterweed (Elodea canadensis).

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