NaCl胁迫下嫁接对茄子生长及抗性生理指标的影响

Effect of Grafting to Eggplant Growth and Resistance Physiology under NaCl

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。

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·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.