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通过盆栽试验,将茄子、土豆、番茄作为砧木嫁接的少花龙葵后代与小白菜混种,研究了镉胁迫条件下(10 mg kg~(-1)),少花龙葵种间嫁接后代对小白菜生长及镉积累的影响。结果表明:混种少花龙葵种间嫁接后代均能提高小白菜的生物量和叶绿素含量,其大小顺序均为:混种茄子砧木的少花龙葵嫁接后代>混种土豆砧木的少花龙葵嫁接后代>混种未嫁接少花龙葵>混种番茄砧木的少花龙葵嫁接后代>单种。同时,混种少花龙葵种间嫁接后代也能提高小白菜根系镉含量、地上部分镉含量及整株镉含量。混种小白菜后,番茄砧木嫁接的木少花龙葵后代的地上部分生物量、地上部分镉含量及地上部分镉积累量较未嫁接少花龙葵均有所提高,分别较未嫁接少花龙葵提高了7.73%、7.54%和15.84%,其余的处理则提高不明显或低于未嫁接少花龙葵。因此,少花龙葵不适合混种镉污染条件下的小白菜,但番茄作为砧木嫁接的少花龙葵后代能够提高少花龙葵对土壤镉污染的修复能力。
Pot experiments were carried out to study the effects of cadmium stress (10 mg kg ~ (-1)) on the progenies of the flower of Solanum nigrum which were grafted with eggplant, potato and tomato as rootstocks. Effect on the Growth and Cadmium Accumulation of Brassica chinensis. The results showed that all the hybrid descendants could increase the biomass and chlorophyll content of the Chinese cabbage, the order of their size was: Solanum grafted offspring> hybrids not grafted less flower Solanum> Mixed tomato rootstock less flower Solanum grafted offspring> a single species. At the same time, hybrid descendants can also increase the root cadmium content of Chinese cabbage, aboveground cadmium content and whole plant cadmium content. After mixed with Chinese cabbage, the aboveground biomass, the aboveground cadmium content and the aboveground cadmium accumulation of the grafted tomato seedlings were higher than those of the non-grafted solanum, Solanum nymphaea increased by 7.73%, 7.54% and 15.84%, while the rest increased slightly or less than that of unripe. Therefore, Siberian Solanum is not suitable for the hybrid cabbage under the conditions of Cd pollution, but tomato as a rootstock grafted Haloxylon solanum offspring can improve the Sarcandra soba soil Cd repair capacity.