The invention relates to a plant extract from the calyx of one of the many plants of the Solanaceae family, of the Physalis genus, comprising mainly one or more moderately polar to non-polar sucrose esters having a carbon number of acyl groups from C1 to C10 for use as an active agent in cosmetic, dermatological or nutracosmetic compositions. It also relates to the purified sucrose esters of the plant extract or the synthesised sucrose esters as described for the same use.The invention also relates to a cosmetic, dermatological or nutracosmetic composition comprising as active ingredient, a plant extract or the synthesised sucrose esters in a suitable physiological medium.Finally, it also relates to the preparation method of the said plant extract.