RT Journal Article SR Electronic T1 Flowering behaviour in Arabis alpina ensures the maintenance of a perennating dormant bud bank JF bioRxiv FD Cold Spring Harbor Laboratory SP 562868 DO 10.1101/562868 A1 Alice Vayssières A1 Priyanka Mishra A1 Adrian Roggen A1 Udhaya Ponraj A1 Ulla Neumann A1 Klaus Theres A1 Karin Ljung A1 Maria C. Albani YR 2019 UL http://biorxiv.org/content/early/2019/02/28/562868.abstract AB Arabis alpina, similar to woody perennials, has a complex architecture with a zone of axillary vegetative branches and a zone of dormant buds that serve as perennating organs. We show that floral development during vernalization is the key for shaping the dormant bud zone by facilitating a synchronized and rapid growth after vernalization and thereby causing an increase in auxin response and transport and endogenous indole-3-acetic acid (IAA) levels in the stem. Floral development during vernalization is associated with the development of axillary buds in subapical nodes. Our transcriptome analysis indicated that these buds are not dormant during vernalization but only attain sustained growth after the return to warm temperatures. Floral and subapical vegetative branches grow after vernalization and inhibit the development of the buds below. Dormancy in these buds is regulated across the A. alpina life cycle by low temperatures and by apical dominance in a BRANCHED 1-dependent mechanism.