Disordered Distribution of Amynoplasts and High Ga Content Related To Negative Gravitropic Growth of Peanut Gynophore in MLO-Infected Plants

Peanut produces aerial flowers but buries its developing seeds into the ground by means of a specialized organ, the gynophore. Gravitropism is the unusual character of gynophore as reproductive organ. Recently, we found the gynophores grow directly upward in mycoplasma-like organisms (MLO) infected peanut plants. To explain the negative gravitropism of the MLO-infected gynophores, gynophores from both infected and uninfected peanut plants were collected; anatomical structure and auxins content of these gynophores were analyzed. This study will also provide an additional data to research of the gynophores gravitropicsm [1].