Summary
Penetration of the phloem of young and mature leaves ofNerium oleander by stylets of the aphid,Aphis nerii was studied with light, phase and differential interference contrast microscopes. Two of five pairs of stylet tips encountered in young leaves and eleven of sixteen pairs encountered in mature leaves were lodged in sieve tubes of the adaxial phloem. In young leaves, the majority of penetrations originated from the abaxial epidermis; conversely, the majority of penetrations in mature leaves originated from the adaxial epidermis. In all instances, penetration of the epidermis, ground tissue and phloem was largely intercellular.
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Botha, C.E.J., Evert, R.F. & Walmsley, R.D. Observations of the penetration of the phloem in leaves ofNerium oleander (Linn.) by stylets of the aphid,Aphis nerii (B. de F.). Protoplasma 86, 309–319 (1975). https://doi.org/10.1007/BF01287481
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DOI: https://doi.org/10.1007/BF01287481