May be involved in osmotic stress and abscisic acid signaling in a calcium-dependent manner. Expressed mainly in roots and flowers. Lower in stems and leaves. Up-regulated by salt, osmotic and oxidative stresses. Up-regulated by abscisic acid (ABA) and salicylic acid (SA). Down-regulated by heat shock and dehydration stresses. A pair of annexin repeats may form one binding site for calcium and phospholipid. Plants are hypersensitive to osmotic stress and abscisic acid (ABA) during germination and early seedling growth. Belongs to the annexin (TC 1.A.31.1) family.