Has a peroxidase activity. May act in counteracting oxidative stress. May also mediate regulated, targeted secretion of Golgi-derived vesicles during seedling development. Active at pH 7.0 and 9.0, but not at pH 5.5. Monomer and homodimer. translocate from cytosol to membrane upon salt treatment; this translocation is calcium dependent. Ubiquitous. Most abundant in stems. Expressed in the elongation zone of the root and in the root cap in germinating seedlings. Expressed later in the internal cells of the root and in the epidermal cells and the vascular tissue of the hypocotyl. By day 7, expressed in the initiating trichomes on leaf primordia and in the vasculature of hypocotyl and cotyledon. At the transition to reproductive growth (day 14), expressed in the vasculature, epidermis, basal mesophyll cells and pith meristem of leaves. Up-regulated by cold, dehydration, salt, osmotic and oxidative stresses. Up-regulated by abscisic acid (ABA) and salicylic acid (SA). A pair of annexin repeats may form one binding site for calcium and phospholipid. Phosphorylated. Plants are hypersensitive to osmotic stress and abscisic acid (ABA) during germination and early seedling growth. Binds lipids at millimolar calcium concentration. Belongs to the annexin (TC 1.A.31.1) family.