OsLOX2 Gene Holds Key to Seed Longevity
May 7, 2014| |
Keeping the seed viability during long term storage is a universal problem in rice. Avoiding and/or reducing the seed deterioration during storage is a vital breeding goal for rice breeders. Lipoxygenases (LOX) are enzymes commonly related to degradation of storage lipids during seed germination. However, little is known about their effect on seed longevity during storage.
In this study, the role of rice OsLOX2 gene from 3-day-old seedlings of rice cultivar Nipponbare was characterized. It functions both in seed germination and longevity were investigated by over expression and RNA interference (RNAi). OsLOX2 was highly induced during germination. Lines over-expressing OsLOX2 had accelerated seed germination under normal conditions and lower seed viability after accelerated aging. RNA interference of OsLOX2 caused delayed germination and enhanced seed longevity. Moreover, RNAi lines with strongly repressed OsLOX2 activity lost the capability of germination after accelerated aging.
OsLOX2 was found to accelerate growth during seed germination. However, it also decreases longevity during storage. Repression of the OsLOX2 may delay the aging process during the storage without losing viability.
To know more about OsLOX2, visit http://link.springer.com/article/10.1007/s11248-014-9803-2/fulltext.html.
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