The objectives of this study are as follows: a. To investigate the distribution and morphological characterization of lenticals in different pear cultivar(Wonwhang, Chojuro, Whasanbae, Hosui, Niitaka, Gamcheonbae, and Chuwhangbae); b. To investigate developmental and morphological characterization o...
The objectives of this study are as follows: a. To investigate the distribution and morphological characterization of lenticals in different pear cultivar(Wonwhang, Chojuro, Whasanbae, Hosui, Niitaka, Gamcheonbae, and Chuwhangbae); b. To investigate developmental and morphological characterization of stone cells in different pear cultivars; c. and to investigate the influence of lenticels and stone cells to pear quality for organic pear compare with conventional pear. The results of this study can be summarized to put it briefly as follows; 1. As a results of process of lenticel's formation, a stoma was clearly observed in the ‘Niitaka’ pear in 27 days after full bloom(DAFB). However, the stoma was gradually suberized with a development of full-thickness tissue by sunlight and external environmental factors in 41 DAFB, and it turned into lenricel on pear skin. The lenticel from 53DAFB was going on suberization, and size of it was maximum 1mm in 82 DAFB, and a vestigial organ was remained in harvest periods. 2. As a results of investigation for change of morphological characterization of lenticel based on growth stage by pear cultivar, the lenticel was formed from 53DAFB, and had a attribute characteristic of lenticel in 82DAFB. In precocious species 'Wonwhang', size of lenticel was about 500㎛ in 82 DAFB with in shape of full-bloom of the Daisy Fleabane, and it was increased to 1mm in 117 DAFB due to the suberization of lenticels. In case of 'Chojuro', a shape of lenticel was changed from round projection to diamond shape. A shape of lenticel in 'Whasanbae' was jutted out in a round circle. Moreover, the lenticel of 'Gamcheonbae' was changed from star shape to ovar shape by degrees, and a lenticel's size was 500㎛ in early stage but it leaves traces of lenticel with 1mm size in the latter stage due to felt off a projecting part. In 'Niitaka', lenticel's shape was changed from ovar shape to cleft shape with the edge. In precocious species 'Chuwhangbae', the lenticel was indistinguishable from pear skin. A size of lenticel was 1mm in the early stage, but was increased to about 2mm in the latter stage. 3. Number of lenticel was investigated during the growing stage in different pear cultivar. The distribution of lenticel in calyx end of pear fruit, the highest cultivar was 'Wonwhang' with 258/cm2 and the lowest cultivar was 'Chuwhangbae' with 147/cm2. The rate of decrease of lenticel per unit area was greater in 'Chuwhangbae' and was lower in 'Gamcheonbae'. The lenticel in all pear cultivar was highly distributed in calyx end of pear fruit. The lenticel's size in early stage has influenced on the latter stage due to the difference of cell's hypertrophy by pear cultivar. A biggest lenticel was 'Chuwhangbae' with 0.37mm2 and 'Wonwhang' has showed a smallest lenticel with 0.11mm2. By growing stage, an average size of lenticel in 'Housi' has increased greatly, but 'Wonwhang' showed changeless. 4. As a results of investigation for change of morphological characterization of stone cell based on growth stage by pear cultivar, a form of stone cell in 'Whasanbae', 'Hosui', 'Gamcheonbae' and 'Chuwhangbae' was irregular without difference of a form and a size. 5. As a results of investigation for number of stone cell by pear cultivar during growth stage, the stone cell per unit area was Gamcheonbae> Wonwhang> Niitaka> Whasanbae> Chojuro> Chuwhangbae> Hosui. The reduction rate was greater in 'Chuwhangbae', and was lowest in 'Gamcheonbae'. The contents of stone cell was greater in early stage and was decreased dramatically from 27th July. The size of stone cell in early stage was maintained untill the harvest stage with 0.03mm2. 6. The number of lenticel in conventional pear farm was average in 14.5 and was average in 19.0 in organic pear farm. However, morphological characterization of lenticel by different pear farm was not differ from 117DAFB. 7. The size of stone cell in the conventional pear farm was average in 0.044mm2, and significantly differs with in 0.031mm2 in the organic pear farm.
The objectives of this study are as follows: a. To investigate the distribution and morphological characterization of lenticals in different pear cultivar(Wonwhang, Chojuro, Whasanbae, Hosui, Niitaka, Gamcheonbae, and Chuwhangbae); b. To investigate developmental and morphological characterization of stone cells in different pear cultivars; c. and to investigate the influence of lenticels and stone cells to pear quality for organic pear compare with conventional pear. The results of this study can be summarized to put it briefly as follows; 1. As a results of process of lenticel's formation, a stoma was clearly observed in the ‘Niitaka’ pear in 27 days after full bloom(DAFB). However, the stoma was gradually suberized with a development of full-thickness tissue by sunlight and external environmental factors in 41 DAFB, and it turned into lenricel on pear skin. The lenticel from 53DAFB was going on suberization, and size of it was maximum 1mm in 82 DAFB, and a vestigial organ was remained in harvest periods. 2. As a results of investigation for change of morphological characterization of lenticel based on growth stage by pear cultivar, the lenticel was formed from 53DAFB, and had a attribute characteristic of lenticel in 82DAFB. In precocious species 'Wonwhang', size of lenticel was about 500㎛ in 82 DAFB with in shape of full-bloom of the Daisy Fleabane, and it was increased to 1mm in 117 DAFB due to the suberization of lenticels. In case of 'Chojuro', a shape of lenticel was changed from round projection to diamond shape. A shape of lenticel in 'Whasanbae' was jutted out in a round circle. Moreover, the lenticel of 'Gamcheonbae' was changed from star shape to ovar shape by degrees, and a lenticel's size was 500㎛ in early stage but it leaves traces of lenticel with 1mm size in the latter stage due to felt off a projecting part. In 'Niitaka', lenticel's shape was changed from ovar shape to cleft shape with the edge. In precocious species 'Chuwhangbae', the lenticel was indistinguishable from pear skin. A size of lenticel was 1mm in the early stage, but was increased to about 2mm in the latter stage. 3. Number of lenticel was investigated during the growing stage in different pear cultivar. The distribution of lenticel in calyx end of pear fruit, the highest cultivar was 'Wonwhang' with 258/cm2 and the lowest cultivar was 'Chuwhangbae' with 147/cm2. The rate of decrease of lenticel per unit area was greater in 'Chuwhangbae' and was lower in 'Gamcheonbae'. The lenticel in all pear cultivar was highly distributed in calyx end of pear fruit. The lenticel's size in early stage has influenced on the latter stage due to the difference of cell's hypertrophy by pear cultivar. A biggest lenticel was 'Chuwhangbae' with 0.37mm2 and 'Wonwhang' has showed a smallest lenticel with 0.11mm2. By growing stage, an average size of lenticel in 'Housi' has increased greatly, but 'Wonwhang' showed changeless. 4. As a results of investigation for change of morphological characterization of stone cell based on growth stage by pear cultivar, a form of stone cell in 'Whasanbae', 'Hosui', 'Gamcheonbae' and 'Chuwhangbae' was irregular without difference of a form and a size. 5. As a results of investigation for number of stone cell by pear cultivar during growth stage, the stone cell per unit area was Gamcheonbae> Wonwhang> Niitaka> Whasanbae> Chojuro> Chuwhangbae> Hosui. The reduction rate was greater in 'Chuwhangbae', and was lowest in 'Gamcheonbae'. The contents of stone cell was greater in early stage and was decreased dramatically from 27th July. The size of stone cell in early stage was maintained untill the harvest stage with 0.03mm2. 6. The number of lenticel in conventional pear farm was average in 14.5 and was average in 19.0 in organic pear farm. However, morphological characterization of lenticel by different pear farm was not differ from 117DAFB. 7. The size of stone cell in the conventional pear farm was average in 0.044mm2, and significantly differs with in 0.031mm2 in the organic pear farm.
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