Therefore, it is concluded that regulation of callus formation and differentiation of the calli by exogenous hormone is closely related to some endogenous factors and external condition.
因此，认为植物产生愈伤组织和再分化为植株不仅与外源激素有关，而且因植物材料和营养条件而异。
Lower concentrations of 2, 4-d were favourable for callus formation and differentiation, while high concentrations of 2, 4-d reduced the capacity of the callus growth and differentiation.
较低的2,4 - d浓度有利于原生质体愈伤组织的形成和分化，过高的2,4 - d浓度对愈伤组织的形成和分化有不利的影响。
Lower concentrations of 2, 4-d were favourable for callus formation and differentiation, while high concentrations of 2, 4-d reduced the capacity of the callus growth and differentiation.
较低的2,4 - d浓度有利于原生质体愈伤组织的形成和分化，过高的2,4 - d浓度对愈伤组织的形成和分化有不利的影响。
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