NaCl胁迫下嫁接对茄子生长及抗性生理指标的影响

以野生茄托鲁巴姆(Solanum torvum)为砧木,茄子(Solanum Melongena)品种西安绿茄为接穗进行嫁接,测定了5个不同浓度(0、200、400、600、800mmol·L-1)NaCl溶液胁迫下嫁接茄和自根茄的各项生长及生理指标。结果表明:嫁接茄盐害指数比自根茄降低了29.09～45.45,嫁接茄的株高、茎粗、地上部鲜质量、根鲜质量比自根茄分别增加6.63%～11.52%、8.05%～55.34%、13.97%～45.29%、30.91%～97.35%,嫁接茄叶绿素含量、脯氨酸(Pro)含量、根系活力分别比自根茄增加113%～265%、73%～136%、173%～386%;嫁接茄过氧化物酶(POD)活性、多酚氧化酶(PPO)活性、苯丙氨酸解氨酶(PAL)活性比自根茄分别增加27.12%～86.32%、44.80%～250.00%、22.65%～41.33%,而丙二醛含量和相对电导率则比自根茄降低了37.89%～81.94%、26.12%～54.55%。因此,嫁接可以提高茄子的耐盐性。

Effect of Grafting to Eggplant Growth and Resistance Physiology under NaCl

The commonly grown eggplant（Solanum melongena L.）cultivar‘Xi’anlvqie’ was used as scion. It was grafted with eggplant rootstock（Solanum torvum）. Growth and physiology of grafted eggplants and self-rooted eggplants under 5 different concentrations of NaCl solutions（0, 200, 400, 600, 800 mmol&;#8226;L-1）were assayed. Results showed that salt injury index to grafted eggplants declined 29.09-45.45 than self-rooted control. The plant height, stem diameter, fresh weight of aboveground, fresh weight of root, the chlorophyll content, proline content（Pro）, root activity, peroxidase（POD）activity, polyphenoloxidase（PPO）activity and phenylalanine ammonia-lyase（PAL）activity of grafted eggplants were higher than self-rooted control 6.63 %-11.52 %, 8.05 %-55.34 %, 13.97 %-45.29 %, 30.91 %-97.35 %, 113 %-265 %, 73 %-136 %, 173 %-386 %, 27.12 %-86.32 %, 44.80 %-250.00 %, 22.65 %-41.33 %, respectively. Malondialdehyde（MDA）content and relative conductivity were lower comparing with control 37.89 %-81.94 % and 26.12 %-54.55 %. Therefore, eggplant resistance under NaCl will be improved by grafting.