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以野生茄托鲁巴姆(Solanum torvum)为砧木,茄子品种西安绿茄为接穗进行嫁接,研究不同水分胁迫下嫁接对其生长和生理生化指标的影响。结果表明:土壤水分胁迫严重限制了嫁接茄和自根茄的生长,在对照(80%～85%)处理下差异不明显,在轻度(50%～55%)、重度(35%～40%)水分胁迫下差异显著;与自根茄相比,各处理嫁接茄的株高和茎粗显著增加(P<0.05);地上部鲜重、根鲜重和地上部干重、根干重均呈显著增加趋势;叶片相对含水量和叶绿素含量也显著增加;而相对电导率和丙二醛(MDA)含量较自根茄显著下降;嫁接极显著地增加了叶片的脯氨酸和可溶性糖含量;随着胁迫时间的延长和程度的加大,嫁接茄叶片的超氧化物酶(SOD)和过氧化物酶(POD)活性与自根茄差异达显著水平(P<0.05);嫁接增强了植株长势,能够调节自身渗透调节物质的含量和保护酶系统活性,来减轻干旱伤害,维持植物体的正常生理代谢功能,表现出较强的抗旱耐旱能力。
The effects of grafting on the growth and physiological and biochemical indexes of Solanum torvum as rootstocks and the eggplant variety Emerald as the scion were studied. The results showed that the soil water stress severely limited the growth of grafted and self-rooted tomatoes, but the difference was not obvious under the control (80% -85%). The differences were not significant in mild (50% -55%) and severe %) Under water stress. The height and stem diameter of grafted eggplants increased significantly (P <0.05) compared with those of self-rooted shoots. The aboveground fresh weight, fresh weight of shoots and aboveground dry weight, root dry weight The relative water content and the content of chlorophyll also increased significantly, while the relative conductivity and the content of malondialdehyde (MDA) decreased significantly compared with that of root and root. Grafting significantly increased the content of proline and soluble sugar Content. With the prolongation of the stress time and degree, the activities of superoxidase (SOD) and peroxidase (POD) in grafted tomato leaves were significantly different from that of the rooted tomato (P <0.05) The growth of plants can regulate its osmotic adjustment substances and protect the activity of the enzyme system to reduce drought damage and maintain normal physiological metabolic function of plants, showing a strong capacity of drought and drought tolerance.