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Paper Information

Journal:   PAJOUHESH-VA-SAZANDEGI   SPRING 2008 , Volume 21 , Number 1 (78 IN AGRONOMY AND HORTICULTURE); Page(s) 11 To 18.
 
Paper: 

INVITRO MICROTUBER ENLARGEMENT OF POTATO (SOLANUM TUBEROSUM L.) AND PARENCHYMA CELLS HETEROGENEOUS GROWTHS

 
 
Author(s):  EBADI MOSTAFA*, IRANBAKHSH A.R., BAKHSHI KHANIKI GHOLAM REZA
 
* BIOLOGY DEPARTMENT, ISLAMIC AZAD UNIVERSITY, DAMGHAN BRANCH, IRAN
 
Abstract: 

The role of cortex and pith parenchyma cells in the invitro growth of microtubers was studied within the period of 10 weeks. In microtuberization induction, the cell divisions started in apical and subapical parts of the induced buds.
The formed microtubers grew in length and diameter (radially). The growth of microtubers decreased within 45 day until the tenth week. The changes in length and width of microtubers were a result from the increase of cell numbers and cell divisions alongaxes. The cells produced from the activation of the microtuber apical meristem were more than those along the transverse axis. The increases of pith parenchyma cells had a more significant role than cortex parenchyma cells in microtuber diameter growth. The number of pith parenchyma cells increased faster than that of cortex parenchyma cells. The diameter growth of pith parenchyma cells started sooner than that of cortex parenchyma cells. The change of the growth trend from longitudinal to transverse at cortex and pith parenchyma cells were played an important role in microtuber expansion. These changes in cell parenchyma cells started sooner than pith parenchyma cells. The growth in length and width of microtubers were decreased together by the decrease of the division of the apical meristem and cortex and pith parenchyma cells.

 
Keyword(s): CELL GROWTH, MICROTUBER ENLARGEMENT, TISSUE CULTURE, POTATO
 
References: 
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