[Effects of NaCl stress on the growth, antioxidant enzyme activities and reactive oxygen metabolism of grafted eggplant].
By the method of hydroponics and with the salt-tolerant eggplant cultivar 'Torvum Vigor' (Solanum torvum) from Japan as rootstock and the cultivar 'Suqiqie' (Solanum melongena L. ) as scion, this paper studied the differences between grafted and own-root seedlings in their photosynthetic characteristics, antioxidant enzyme activities, and reactive oxygen metabolism under 80 mmol x L(-1) NaCl stress. The results showed that under NaCl stress, the dry mass, chlorophyll content and photosynthetic rate of grafted seedlings were 67.8%, 8. 8% and 31.1% higher than those of own-root seedlings, respectively, and the antioxidant enzyme activities were significantly higher while the O2* producing rate and the hydrogen peroxide (H2O2) and malondiadehyde (MDA) contents were significantly lower in grafted seedlings leaves than in own-root seedlings. For both grafted and own-root seedlings, NaCl stress reduced the chlorophyll content and photosynthetic rate, but increased the O2* producing rate and the H2O2 and MDA contents significantly. However, the growth of grafted seedlings was less affected by NaCl stress. The stronger salt tolerance of grafted eggplant seedlings was related to their higher antioxidant enzyme activities and less oxidative damage.
Liu
Zheng-Lu
ZL
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. luzghlu@163.com
Zhu
Yue-Lin
YL
Hu
Chun-Mei
CM
Wei
Guo-Ping
GP
Yang
Li-Fei
LF
Zhang
Gu-Wen
GW
D000383:Agriculture / Q000379:methods; D010544:Peroxidases / Q000378:metabolism; D010788:Photosynthesis / Q000502:physiology; D017382:Reactive Oxygen Species / Q000378:metabolism*; D036226:Seedlings / Q000254:growth & development / Q000378:metabolism; D012965:Sodium Chloride / Q000494:pharmacology*; D032323:Solanum melongena / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000378:metabolism*
D017382:Reactive Oxygen Species; D012965:Sodium Chloride; D010544:Peroxidases; D013482:Superoxide Dismutase