Abstract
The relationship of abscisic acid (ABA) and 2-trans-abscisic acid (t-ABA) to alternate bearing has been examined in 'Wilking' mandarin (Citrus reticulata Blanco) trees. Leaves, stems and buds of trees loaded with fruit ('on' trees) had 4.3, 6.0 and 2.2 fold higher ABA levels than the corresponding organs from 'off' trees. Leaves had higher ABA levels than stems and buds in both 'on' and 'off' trees. t-ABA was non-detectable in 'Wilking' leaf, stem and bud tissue. Amounts of t-ABA not exceeding 40% of the ABA content, were found in 'Shamouti' and 'Valencia' orange buds and in 'Wilking' fruit peel. The elevated levels of ABA in 'on' tree organs may reflect a stress imposed by the fruit overload.
| Original language | English |
|---|---|
| Pages (from-to) | 9-13 |
| Number of pages | 5 |
| Journal | Plant Growth Regulation |
| Volume | 2 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 1984 |
Keywords
- abscisic acid
- alternate bearing
- Citrus reticulata Blanco