Overexpression of jasmonic acid carboxyl methyltransferase increases tuber yield and size in transgenic potato

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Title
Overexpression of jasmonic acid carboxyl methyltransferase increases tuber yield and size in transgenic potato
Author(s)
H B Sohn; H Y Lee; J S Seo; C Jung; Jae Heung Jeon; J H Kim; Y W Lee; J S Lee; S J Cheong; Y D Choi
Bibliographic Citation
Plant Biotechnology Reports, vol. 5, no. 1, pp. 27-34
Publication Year
2011
Abstract
Jasmonates control diverse plant developmental processes, such as seed germination, flower, fruit and seed development, senescence and tuberization in potato. To understand the role of methyl jasmonate (MeJA) in potato tuberization, the Arabidopsis JMT gene encoding jasmonic acid carboxyl methyltransferase was constitutively overexpressed in transgenic potato plants. Increases in tuber yield and size as well as in vitro tuberization frequency were observed in transgenic plants. These were correlated with JMT mRNA level-the higher expression level, the higher the tuber yield and size. The levels of jasmonic acid (JA), MeJA and tuberonic acid (TA) were also higher than those in control plants. Transgenic plants also exhibited higher expression of jasmonate-responsive genes such as those for allene oxide cyclase (AOC) and proteinase inhibitor II (PINII). These results indicate that JMT overexpression induces jasmonate biosynthesis genes and thus JA and TA pools in transgenic potatoes. This results in enhanced tuber yield and size in transgenic potato plants.
Keyword
Jasmonic acid (JA)Jasmonic acid carboxyl methyltransferase (JMT)Methyl jasmonate (MeJA)PotatoTuberizationTuberonic acid (TA)
ISSN
1863-5466
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s11816-010-0153-0
Type
Article
Appears in Collections:
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
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