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Title 

Sweetpotato late embryogenesis abundant 14 (IbLEA14) gene influences lignification and increases osmotic- and salt stress-tolerance of transgenic calli

Authors 

S C ParkYun Hee KimJae Cheol JeongCha Young KimHaeng Soon LeeJ W BangSang Soo Kwak

Publisher 

Springer Verlag (Germany)

Issue Date 

2011

Citation 

Planta, vol. 233, no. 3, pp. 621-634

Keywords 

Abiotic stressIpomoeaLate embryogenesis abundant proteinLigninTransgenic callus

Abstract 

Late embryogenesis abundant 14 (LEA14) cDNA was isolated from an EST library prepared from dehydration-treated fibrous roots of sweetpotato (Ipomoea batatas). Quantitative RT-PCR revealed a variety of different IbLEA14 expression patterns under various abiotic stress conditions. IbLEA14 expression was strongly induced by dehydration, NaCl and abscisic acid treatments in sweetpotato plants. Transgenic sweetpotato non-embryogenic calli harboring IbLEA14 overexpression or RNAi vectors under the control of CaMV 35S promoter were generated. Transgenic calli overexpressing IbLEA14 showed enhanced tolerance to drought and salt stress, whereas RNAi calli exhibited increased stress sensitivity. Under normal culture conditions, lignin contents increased in IbLEA14-overexpressing calli because of the increased expression of a variety of monolignol biosynthesis-related genes. Stress treatments elicited higher expression levels of the gene encoding cinnamyl alcohol dehydrogenase in IbLEA14-overexpressing lines than in control or RNAi lines. These results suggest that IbLEA14 might positively regulate the response to various stresses by enhancing lignification.

ISSN 

0032-0935

Link 

http://dx.doi.org/10.1007/s00425-010-1326-3

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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