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SFB 564: D1.3 - Regulation of flowering in tropical fruit crops on erosion prone sites in Northern Thailand
Project
Project code: keine Angaben
Contract period: 01.01.2000
- 01.01.2009
Purpose of research: Basic research
Specific basic and applied science activities for each crop will be carried out in an attempt to solve the following issues.
Longan
Previous research work has shown that flower induction can successfully be manipulated by application of KClO3. This crop is therefore an ideal “model plant” to investigate the regulatory mechanisms of flowering by:
1. determining acquisition and distribution of KClO3 using isotope labelling techniques and measuring enzyme activities in leaves to decide whether nitrate reductase is involved in the conversion and flower inducing activity of KClO3;
2. identifying mutual influences between hormones including their time-dependent changes brought about by manipulation of hormone biosynthesis through exogenously applied plant growth regulators (PGRs);
3. investigating the effect of “off-season” production systems on carbohydrate distribution and reserves
Mango
Paclobutrazol (PBZ) is already commercially used to manipulated flower induction in mango, however, the technique may not be sustainable due to its persistence in plant and soil. Prohexadione-Ca (Pro-Ca), another gibberellin biosynthesis inhibiting compound, and specific crop management techniques may prove to be successful and more sustainable alternatives to PBZ and warrant detailed investigation by:
1. evaluating appropriate time-of-season, concentration and application procedure (injection or spray) of Pro-Ca as possible alternative of PBZ and subsequent effects on hormonal status;
2. pruning or defoliation techniques which may induce a secondary flower through an altered hormonal status in the bud tissue.
Section overview
Subjects
- Crop Production
