Bostwick, D. E., Dannenhoffer, J. M., Skaggs, M. I., Lister, R. M., Larkins, B. A., & Thompson, G. A. (1992). Pumpkin phloem lectin genes are specifically expressed in companion cells.

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Bostwick, D E., et al. Pumpkin Phloem Lectin Genes Are Specifically Expressed in Companion Cells. 1992.