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Gaseous NO2 effects on stomatal behavior, photosynthesis and respiration of hybrid poplar leaves

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Hu Y., Bellaloui N., Tigabu N., Wang J., Diao J., Wang K., Yang R., Sun G.

Acta Physiologiae Plantarum

2015

tom 37

nr 02

In this study, we used poplar as a model plant and investigated the effects of gaseous nitrogen dioxide (NO2, 4 ll 1-1) on stomatal conductance, photosynthesis, dark- and photorespiration of Populus alba 9 Populus berolinensis hybrid leaves using the photosynthesis system and scanning electron microscope technique. The results showed that net photosynthetic rates were significantly reduced in leaves exposed to 4 ll 1-1 NO2 for 48 h as compared with leaves exposed to ambient carbon dioxide 380 ll 1-1 and ambient NO2\0.1 ll 1-1 (the control) and the leaves exposed for 14 h. The decline of net photosynthetic rate was caused mainly by NO2 treatment. Dark respiration rates were dependent on co-action of the two factors (leaf temperature and NO2 treatment time). Postillumination carbon dioxide burst in the exposed leaves occurred at 13–15 s after turning the light off, whereas this phenomenon was absent in the control leaves.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Bellaloui N.

1 Diao J.

1 Hu Y.

1 Sun G.

1 Tigabu N.

1 Wang J.

1 Wang K.

1 Yang R.

1 2015

Wyniki wyszukiwania

Gaseous NO2 effects on stomatal behavior, photosynthesis and respiration of hybrid poplar leaves