Patykowski Jacek, Kołodziejek Jeremi, Wala Mateusz
Department of Plant Physiology and Biochemistry, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland.
Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland.
PeerJ. 2018 Dec 21;6:e5958. doi: 10.7717/peerj.5958. eCollection 2018.
The present research investigated the response of silver maple ( L.) to salt treatment. The short- and long-term effects of NaCl and CaCl treatments on plant fitness characteristics (growth parameters, leaf chlorophyll content) and biochemical stress-coping mechanisms (proline accumulation as well as enzymatic activities) were examined. We found that the silver maple response to salt stress strictly depended on salt type and dose-calcium chloride was less toxic than sodium chloride, but high concentrations of both salts negatively influenced plant growth. The accumulation of proline, slight changes in the activity of superoxide dismutase and marked changes in catalase and peroxidase activities in the roots and leaves indicated complexity of the plant response. It was also shown that after one year, enzymatic parameters were restabilized, which indicates plant recovery, but the reduced mass of seedlings suggests that one year is not enough to cope with the prolonged cyclic salt stress, both resulting from NaCl and CaCl application. Therefore, seedlings of silver maple should be considered as moderately susceptible to salinity. Hence, it is recommended to use silver maple on non-de-iced urban areas, while planting on often de-iced roads should be avoided.
本研究调查了银槭（Acer saccharinum L.）对盐处理的反应。研究了氯化钠（NaCl）和氯化钙（CaCl₂）处理对植物适应性特征（生长参数、叶片叶绿素含量）和生化应激应对机制（脯氨酸积累以及酶活性）的短期和长期影响。我们发现，银槭对盐胁迫的反应严格取决于盐的类型和剂量——氯化钙的毒性低于氯化钠，但两种盐的高浓度都会对植物生长产生负面影响。脯氨酸的积累、根和叶中超氧化物歧化酶活性的轻微变化以及过氧化氢酶和过氧化物酶活性的显著变化表明了植物反应的复杂性。研究还表明，一年后，酶参数重新稳定，这表明植物恢复了，但幼苗质量的下降表明，一年时间不足以应对因施用氯化钠和氯化钙而导致的长期周期性盐胁迫。因此，银槭幼苗应被视为对盐分中度敏感。因此，建议在非除冰的城市地区使用银槭，而应避免在经常除冰的道路上种植。
