SO2、NO2、O3及其复合物对水稻体内乙烯释放的影响

乙烯是植物体内的一种内源激素，当植物受到环境污染时，体内乙烯的释放量将发生变化。本文主要报道了水稻受ＳＯ２，ＮＯ２，Ｏ３单一及其复合物熏气对体内乙烯释放的影响。结果表明，水稻受ＳＯ２，ＮＯ２，Ｏ３９单一及其复合物熏气后，体内乙烯释放量增加，在一定条件下反应出环境污染的程度，当Ｏ３浓度不变时，水稻体内乙烯释放量与ＳＯ２，ＮＯ２熏气浓度成正比，其中，Ｏ３＋ＳＯ２对水稻体内乙烯释放量的影响程度大于Ｏ３＋

Effects of Fumigation with sulfur Dioxide, Nitrogen Dioxide, Ozone and Mixtures Thcreof on Ethylene Emissions from Rice

A study was carried out on the effects of fumigation with sulfur dioxide(SO₂),nitrogen dioxide(NO₂),ozone(O₃)and mixtures thereof on the release of ethylene from rice plant being fumigated.It was found that the emission of ethylene as an internal hormone of plant increases when the crop rice is fumigated with SO₂,NO₂,O₃,or mixtures thereof.This can be considered as an indicator for the level of environmental pollution.If the O₃ level is constant, the emission of ethylene from rice is directly proportional to the levels of SO₂ and NO₂ in fumigating gases,where O₃+SO₂ have a greater effect on the emission of ethylene from rice than O₃+ NO₂.If the total level of both SO₂ and NO₂ altogether is kept constant,an increased level of SO₂ can lead to a higher emission of ethylene than an increased level of NO₂.A fumigation with NO₂ at a concentration of 4 ppm for 2 hours has caused the leaves of rice to have bleached or yellow spots when ethylene and ethane are released at 7.70 and 2.30 nl/g·F·W·h,respectively.