**Chapter 4**

*Plant Science - Structure, Anatomy and Physiology in Plants Cultured in Vivo and in Vitro*

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[59] Iraqi D, Tremblay FM. Analysis of carbohydrate metabolism enzymes and cellular contents of sugars and proteins during spruce somatic embryogenesis suggests a regulatory role of exogenous sucrose in embryo development. Journal of Experimental Botany. 2001;**52**:2301- 2311. DOI: 10.1093/jexbot/52.365.2301

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[61] Hirose T, Takano M, Terao T. Cell wall invertase in developing rice

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[63] Swarup R, Kramer EM, Perry P, Knox K, Leyser OH, Haseloff J, et al. Root gravitropism requires lateral root

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**46**
