| 海水处理下菊芋幼苗生理生化特性及磷效应的研究 |
| |
| 引用本文： | 隆小华,刘兆普,徐文君.海水处理下菊芋幼苗生理生化特性及磷效应的研究[J].植物生态学报,2006,30(2):307-313. |
| |
| 作者姓名： | 隆小华 刘兆普 徐文君 |
| |
| 作者单位： | 南京农业大学资源与环境学院,南京 210095 |
| |
| 基金项目： | 国家科技攻关项目;国家科技攻关项目 |
| |
| 摘 要： | 种植抗盐耐海水植物是合理利用和开发海涂资源的有效措施之一。该试验研究了海水处理下菊芋(Helianthus tuberosus)幼苗生长发育、渗透物质积累、保护性酶活性、膜透性和离子吸收分布情况及磷素对其影响。结果表明:1)10%海水对菊芋幼苗生长发育没有抑制作用,甚至有一定的促进作用,25%海水胁迫对菊芋幼苗形态发育上具有一定抑制作用,增加磷素浓度后,能显著缓解其抑制作用;2)10%和25%海水处理下,脯氨酸和可溶性糖含量较对照显著增加,随着时间的延长,先增加后降低,增加磷素浓度后,能显著增加菊芋幼苗叶片脯氨酸和可溶性糖含量;3)海水处理下菊芋幼苗叶片SOD、POD和CAT活性都显著增加,增加磷素浓度后,能显著增强菊芋幼苗叶片SOD、POD和CAT活性;4)10%海水处理菊芋幼苗叶片MDA含量与对照差异不大,甚至小于对照,25%海水处理能显著增加MDA含量及膜透性,增加磷素浓度后,均降低了MDA含量和膜透性;5)随着海水浓度增加和时间延长,菊芋幼苗地上部和根部Na+和Cl-含量显著增加,增加磷素浓度后,均能降低地上部和根部Na+和Cl-含量,而地上部和根部K+、Ca2+和Mg2+含量较对照增加,增加磷素浓度后,均能增加K+、Ca2+和Mg2+含量。由此可见,磷素能够改善菊芋幼苗的营养状况,同时能够增强其抗盐性。
|
| 关 键 词： | 菊芋 磷效应 海水处理 渗透物质 保护酶 离子 |
| 收稿时间： | 2005-04-05 |
| 修稿时间： | 2005-09-05 |
EFFECTS OF SEAWATER TREATMENTS ON THE PHYSIOLOGICAL AND BIOCHEMICAL CHARACTERISTICS OF HELIANTHUS TUBEROSUS SEEDLINGS AND RESPONSE TO PHOSPHORUS SUPPLY |
| |
| LONG Xiao-Hua,LIU Zhao-Pu,XU Wen-Jun.EFFECTS OF SEAWATER TREATMENTS ON THE PHYSIOLOGICAL AND BIOCHEMICAL CHARACTERISTICS OF HELIANTHUS TUBEROSUS SEEDLINGS AND RESPONSE TO PHOSPHORUS SUPPLY[J].Acta Phytoecologica Sinica,2006,30(2):307-313. |
| |
| Authors: | LONG Xiao-Hua LIU Zhao-Pu XU Wen-Jun |
| |
| Affiliation: | College of Resources and Environmental Sciences of NAU, Nanjing 210095, China |
| |
| Abstract: | Growing plants that are tolerant to salt_water is one option for exploiting mudflats along the coast. Pot experiments were carried out to study the effects of seawater on growth, inorganic and organic osmotic, antioxidant enzyme, membrane permeability in Helianthus tuberosus seedlings and response to phosphorus supply. The results showed that 1) compared with the control, the fresh weights of roots and aerial parts of Helianthus tuberosus seedlings treated with 10% seawater changed slightly, even were higher than the control, whereas decreased with treatment of 25% seawaters. The fresh weights of roots and aerial parts increased with the concentration of phosphorus augment. The trends of dry weights of roots and aerial parts resembled the trends of fresh weights with the same treatments. 2) The contents of proline and soluble_sugar increased obviously with increasing seawater concentrations. The contents of proline and soluble_sugar increased on 8 days and decreased on 12 days after the treatments of 10% and 25% seawater. They both increased with phosphorus augment. 3) The activities of SOD, POD and CAT in leaves of seawater_stressed plants were significantly stimulated compared to control plants, and the trends toned up with increasing seawater concentrations. The activities of SOD, POD and CAT all significantly stimulated with phosphorus augment. 4) Compared with the control, there was slight change of MDA content in leaves of Helianthus tuberosus seedlings treated with 10% seawater. The MDA content and ELP significantly increased with the treatment of 25% seawater. They both decreased with phosphorus augment. 5) The Na~+ and Cl~- contents of the aerial parts and roots significantly increased with increasing seawater concentrations and time lasting. And the contents of Na~+ and Cl~- decreased with phosphorus augment. Compared with the control, the contents of K~+, Ca~ 2+ and Mg~ 2+ of the aerial parts and roots increased, and they all increased with phosphorus augment. Above all, phosphorus can improve nutrition and increase resisting salinity for Helianthus tuberosus seedlings. |
| |
| Keywords: | Helianthus tuberosus Effect of phosphorus Treatment of seawater Membrane permeability Antioxidant enzyme Ions |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《植物生态学报》浏览原始摘要信息 |
|
点击此处可从《植物生态学报》下载免费的PDF全文 |
|
