Osonubi O, Osundina M A
Department of Botany and Microbiology, University of Ibadan, Ibadan, Nigeria.
Tree Physiol. 1987 Jun;3(2):147-56. doi: 10.1093/treephys/3.2.147.
The effects of flooding on Gmelina arborea Roxb. seedlings and cuttings of the same parent stock were compared to determine their suitability as transplanting stock. Flooding caused reductions in stomatal conductance, xylem pressure potential and dry matter accumulation in both groups of plants. In seedlings, flooding induced formation of hypertrophied lenticels, stem hypertrophy and production of short, thick, adventitious roots in seedlings, whereas in cuttings, only thin roots and numerous smaller lenticels were induced. For 8 days after the flooding treatment ended, the flooded seedlings grew faster than control seedlings, whereas in cuttings, post-flooding growth was similar to that of control plants. It is suggested that seedlings may perform better than cuttings in very wet or saturated soil.
比较了洪水对同一亲本的石梓幼苗和插条的影响，以确定它们作为移栽材料的适宜性。洪水导致两组植物的气孔导度、木质部压力势和干物质积累减少。在幼苗中，洪水诱导形成肥大的皮孔、茎肥大，并在幼苗中产生短而粗的不定根，而在插条中，只诱导产生细根和许多较小的皮孔。在洪水处理结束后的8天里，受淹幼苗比对照幼苗生长得更快，而在插条中，洪水后的生长与对照植株相似。建议在非常潮湿或饱和的土壤中，幼苗可能比插条表现更好。
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