Figure 2

Auxin pool in decapitated stem delays release of buds from dormancy.

(a,b) Scheme of plant with long stump decapitated 90 mm above the upper bud (a) and plant with short stump decapitated 5 mm above the upper bud (b). Red arrows represent auxin (IAA) flow; red arrows crossed with black X represent disabled auxin flow. Green arrows represent bud outgrowth. Auxin depletion or decrease from the missing apex has impact on bud outgrowth timing. (c,d) Relative expression of PsDRM1 (c) and PsBRC1 (d) genes in the upper axillary bud of plants with long or short stump. Statistically significant differences (identified by Student’s t-test): α = 0.05* and α = 0.01**. Error bars represent standard deviations (n = 4).