Valeur, Johan, 2020. Promoting lateral bud growth in sweet potato (Ipomoea batatas) : comparing the foliar application of synthetic phytohormone and coconut water. First cycle, G2E. Alnarp: SLU, Dept. of Biosystems and Technology (from 130101)
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Abstract
Sweet potato (Ipomea batatas) is an important crop grown worldwide with a rising interest in production in Europe and Sweden. Swedish producers are looking for ways to grow the crop but are facing problems because of low-quality slips from import which leads to a non-profitable production. This inadequate supply becomes a bottleneck for Swedish farmers. A Swedish propagation of slips would be beneficial to Swedish growers but in order to make such a production effective a solution to break the sweet potato's strong apical dominance is needed. Apical dominance is mainly controlled by auxin supply from the apical meristem. Cytokinin is a phytohormone that promotes lateral bud growth and can therefore also be used to aid the breaking of apical dominance.
Although a lot is known about apical dominance there are a lot of unknown factors playing into how it is truly controlled. Coconut water (CW) is a natural, safe and organic biostimulant with enough phytohormones to affect other plants. An experiment was conducted where cuttings of sweet potato rooted in pumice stone and sprayed with a synthetic cytokinin (BAP) or a 20% dilution of CW in order to stimulate lateral bud growth. A control group without any treatment was also made. Every cutting in the experiment had its apex bud removed in order to cut off the main auxin supply. The results showed a 27% higher rate of stimulated lateral buds with BAP treatment and a 20% higher rate with the CW treatment compared to the cuttings without any treatment. The study is too small to prove a correlation but it’s enough to show an indication that these biostimulants might stimulate later bud growth. This indication can be used to motivate a study on a bigger scale.
Main title: | Promoting lateral bud growth in sweet potato (Ipomoea batatas) |
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Subtitle: | comparing the foliar application of synthetic phytohormone and coconut water |
Authors: | Valeur, Johan |
Supervisor: | Karlen, Helena |
Examiner: | Khalil, Sammar |
Series: | UNSPECIFIED |
Volume/Sequential designation: | UNSPECIFIED |
Year of Publication: | 2020 |
Level and depth descriptor: | First cycle, G2E |
Student's programme affiliation: | LY003 Horticultural Science Programme 300 HEC |
Supervising department: | (LTJ, LTV) > Dept. of Biosystems and Technology (from 130101) |
Keywords: | sweet potato, Ipomea batatas, apical dominance, phytohormones, coconut water, foliar application, biostimulant, vegetative propagation |
URN:NBN: | urn:nbn:se:slu:epsilon-s-17335 |
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-17335 |
Subject. Use of subject categories until 2023-04-30.: | Crop husbandry |
Language: | English |
Deposited On: | 28 Oct 2021 09:17 |
Metadata Last Modified: | 29 Oct 2021 04:01 |
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