Transcription activator that binds DNA in a sequence-specific manner, 5'-GAAATTTTGG-3', to promote the expression of target genes (PubMed:20921422, PubMed:21615571, PubMed:23153277, PubMed:29757140). Recruited to the promoter of ICS1 and other defense-related genes (e.g. PR1, PR2 and EDS5) in response to both biotic (e.g. Pseudomonas syringae pv. maculicola ES4326, P. syringae pv. tomato DC3000, and microbe-associated molecular patterns (MAMPs) such as flg22) and abiotic stresses (e.g. UV-B, drought and abscisic acid), thus triggering rapid defense responses by stimulating salicylic acid (SA) biosynthesis. Involved in basal and systemic acquired resistance to P. syringae and Hyaloperonospora arabidopsidis (PubMed:20921422, PubMed:21615571, PubMed:22466450, PubMed:19214217). Mediates resistance to drought and sensitivity to abscisic acid (ABA), especially for ABA-mediated signaling process that regulates early seedling growth (PubMed:22466450). Interacts with calmodulin (CaM) in the presence of calcium ions; this interaction is required for defense responses. (Microbial infection) Interacts with V.dahliae SCP41; the interaction is direct and inhibits CBP60G. Expressed in seedlings, roots, leaves, inflorescences and flowers, and, to a lower extent, in siliques. Particularly present in guard cells. In seedlings, present in roots, except in tips, leaves and petioles. In inflorescence and flowers, accumulates in sepals, carpels (e.g. styles and floral nectars) and stamens (e.g. filaments and vascular tissue of anthers), but not in petals or stigma. Induced rapidly by pathogenic bacteria Pseudomonas syringae pv. maculicola ES4326 and P. syringae pv. tomato DC3000, by the root-colonizing endophytic plant growth-promoting fungus Piriformospora indica, and by microbe-associated molecular patterns (MAMPs) such as flg22 and hrcC in both local and systemic leaves in both local and systemic leaves (PubMed:20921422, PubMed:19214217, PubMed:23153277, PubMed:23118477). Accumulates transiently in response to 12-oxo-phytodienoic acid (OPDA) (PubMed:16258017). Reduced basal resistance to Pseudomonas syringae pv. maculicola ES4326 and P. syringae pv. tomato DC3000. Impaired systemic acquired resistance (SAR) induced by P. syringae toward Hyaloperonospora arabidopsidis Noco2. Plants lacking both SARD1 and CBP60G fail to accumulate salicylic acid (SA) and to express PR1 and SID2 upon both biotic and abiotic stresses. Belongs to the plant ACBP60 protein family. Truncated N-terminus.