과실 제거가 '부유' 단감 유목의 질소화합물 분배와 축적 및 재이용에 미치는 영향

Effect of Defruiting on Nitrogen Partitioning, Accumulation, and Remobilization of Young Trees in 'Fuyu' Persimmon

  • Park, Soo-Jeong (Department of Horticulture, College of Agriculture and Life Sciences, Gyeongsang National University)
  • 투고 : 2011.06.02
  • 심사 : 2011.08.08
  • 발행 : 2011.08.30

초록

본 연구는 3-4년생인 '부유' 감나무를 이용하여 정상적인 착과수와 결실 후 어린 과실을 따버린 제과수의 수체 부위별 질소화합물 분배 비율의 변화를 조사함으로써 저장양분의 축적 그리고 다음해 새로운 생장에 이들 저장양분의 재이용 관계를 구명하였다. 6월 15일부터 11월 1일까지 아미노산은 착과수의 영구기관에서 변화의 일관성이 없는 반면 제과수에서는 아미노산이 현저히 증가하였다. 착과수와 비교하면, 제과수의 영구기관에 축적된 주당 아미노산 함량이 3년생은 1.66g, 4년생은 3.48g 많았다. 이 기간 동안 착과수에서는 증가한 총 단백질의 50% 이하가 영구기관으로 분배되었으나 제과수에서는 그 비율이 90% 이상이었고, 특히 뿌리로 분배된 비율이 3년생은 94%, 4년생은 76%에 달하여 뿌리의 단백질 축적이 현저한 것을 알 수 있었다. 착과수의 영구기관에 축적된 주당 단백질 함량과 비교하면 제과수의 3년생은 1.64g, 4년생은 2.58g이 많았다. 이 기간 동안 질소화합물이 착과수의 잎에서 0.50-0.56g이 감소하였고, 과실에서 0.66-0.78g이 증가하였다. 이듬해 신초생장기 동안 아미노산은 전년도 착과수와 제과수의 영구기관에서 모두 감소하였다. 단백질은 전년도 제과수의 뿌리에서 특히 감소하였다. 새로운 생장 부위의 아미노산과 단백질은 전년도 제과수에서 높은 것으로 나타났다. 제과수는 착과수보다 뿌리를 주축으로 하는 영구기관에 더 많은 질소화합물을 축적함으로써 다음해의 생장과 결실에 기여할 수 있을 것으로 생각한다.

This study examined the changes in the distribution of nitrogenous compounds in various parts of 3- and 4-year-old persimmon (Diospyros kaki cv. Fuyu) with fruits (fruited) and without fruits (defruited). The effect of the changes was then related to the storage and their reutilization for new growth in the following year. From June 15 to November 1, the partitioning of amino acids among perennial parts of fruited trees was inconsistent, whereas that of defruited trees was characterized by a significant increase. Compared with the fruited trees, amino acids accumulated in the perennial parts of defruited trees were 1.66 g and 3.48 g more in 3- and 4-year-old trees, respectively. Of the total proteins increased during this period, the proportions distributed to the perennial parts of the tree were less than 50% for fruited trees, but they were more than 90% for defruited trees. Roots were the strongest sink for proteins; percent proteins in the roots amounted to 94 in defruited 3-year-old trees and 76 in 4-year-old trees. Compared with the proteins accumulated in perennial parts of fruited trees, those of defruited trees were 1.64 g more in 3-year-old and 2.58 g more in 4-year-old trees. During this period, the nitrogenous compounds decreased by 0.50-0.56 g in the leaves of fruited trees, while they increased by 0.66-0.78 g in their fruits. During the new growth from April 10 to June 10 of the following year, amino acids decreased both in the fruited and defruited trees. Proteins, especially in the root, decreased in the trees that had been previously defruited. More amino acids and proteins were found in the newly grown parts of the defruited trees. Compared with the fruited trees, the defruited trees accumulated nitrogenous compounds more in roots than in the other parts of the perennial parts. The reserve nitrogenous compounds contributed to the new shoot growth and fruit set in the following year.

키워드

참고문헌

  1. Cheng, L. and L.H. Fuchigami. 2002. Growth of young apple trees in relation to reserve nitrogen and carbohydrates. Tree Physiol. 22:1297-1303. https://doi.org/10.1093/treephys/22.18.1297
  2. Choi, S.T., D.S. Park, S.M. Kang, and Y.C. Cho. 2010a. Effect of fruit-load on the growth, absorption, and partitioning of inorganic nutrients in young 'Fuyu' persimmon trees. Sci. Hort. 126:408-412. https://doi.org/10.1016/j.scienta.2010.07.035
  3. Choi, S.T., S.M. Kang, D.S. Park, W.D. Song, and G.H. Ahn. 2003. Effect of different severities of summer pruning on fruit characteristics and tree growth in young 'Fuyu' and 'Nishimurawase' persimmon. J. Kor. Soc. Hort. Sci. 44:569-578.
  4. Choi, S.T., S.M. Kang, D.S. Park, W.D. Song, and K.K. Seo. 2002. Thinning effect on fruit characteristics and reserve accumulation of persimmon trees defoliated in early autumn. J. Kor. Soc. Hort. Sci. 43:660-665.
  5. Choi, S.T., W.D. Song, D.S. Park, and S.M. Kang. 2010b. Effect of different girdling dates on tree growth, fruit characteristics and reserve accumulation in a late-maturing persimmon. Sci. Hort. 126:152-155. https://doi.org/10.1016/j.scienta.2010.06.026
  6. Collins, R.J. and A.P. George. 1997. Managing crop load on nonastringent persimmon (Diospyros kaki L.) grown in the subtropics. Acta Hort. 436:251-260.
  7. George, A.P., R.J. Nissen, R.J. Collins, and T.S. Rasmussen. 1995. Effects of fruit thinning, pollination and paclobutrazol on fruit set and size of persimmon (Diospyros kaki L.) in subtropical Australia. J. Hort. Sci. 70:477-484.
  8. Kang, S.M., K.C. Ko, and J.S. Titus. 1982. Mobilization and metabolism of protein and soluble nitrogen during spring growth of apple trees. J. Amer. Soc. Hort. Sci. 107:209-213.
  9. Kim, J.C. and S.M. Kang. 2006. Fruit-load effect on seasonal changes of nonstructural carbohydrates in shoots of mature persimmon trees during senescence. Hort. Environ. Biotechnol. 47:329-335.
  10. Kim, Y.K., C.S. Lim, S.M. Kang, and J.L. Cho. 2009. Root storage of nitrogen applied in autumn and its remobilization to new growth in spring of persimmon trees (Diospyros kaki cv. Fuyu). Sci. Hort. 119:193-196. https://doi.org/10.1016/j.scienta.2008.07.013
  11. Park, D.S., S.M. Kang, G.M. Shon, C.W. Ro, and W.K. Shin. 1999. Growth and carbohydrate accumulation of shoots and fruit characteristics of 'Fuyu' persimmon as affected by the size of bearing mother branches. J. Kor. Soc. Hort. Sci. 40:455-458.
  12. Park, D.S., S.M. Kang, S.T. Choi, C.A. Lim, and W.D. Song. 2003. Effect of secondary-shoot prunings on fruit growth and following year's fruit set of 'Fuyu' persimmon. J. Kor. Soc. Hort. Sci. 44:678-682.
  13. Park, D.S., S.T. Choi, K.K. Seo, K.H. Ahn, S.C. Kim, W.D. Song, and S.M. Kang. 2000. Shoot growth and fruit characteristics of 'Fuyu' persimmon as affected by the size of bearing mother branches and the time of fruit-load adjustment. J. Kor. Soc. Hort. Sci. 41:401-405.
  14. Park, D.S., S.T. Choi, S.C. Kim, and S.M. Kang. 2008. Yield, fruit quality, and branch extension of 'Fuyu' persimmon as affected by the length of bearing mother branches. Kor. J. Hort. Sci. Technol. 26:101-105.
  15. Park, S.J. 2002. Effect of different degrees of defoliation on fruit quality, reserve accumulation and early growth of young Fuyu persimmon. Kor. J. Hort. Sci. Technol. 20:110-113.
  16. Taylor, B.K. and L.H. May. 1967. The nitrogen nutrition of the peach tree. II. Storage and mobilization of nitrogen in young trees. Austral. J. Biol. Sci. 20:389-411.
  17. Titus, J.S. and S.M. Kang. 1982. Nitrgen metabolism, translocation, and recycling in apple trees. Hort. Rev. 4:204-246.
  18. Yoon, M.S. 1996. Seasonal changes of nitrogenous compounds and carbohydrates in one-year-old seedlings of persimmon (Diospyros kaki). J. Kor. Soc. Hort. Sci. 37:257-262.