Contents and Distribution of Different Forms of Calcium in Prunus humilis

ACTA HORTICULTURAE SINICA ›› 2007, Vol. 34 ›› Issue (3): 755-759.

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Contents and Distribution of Different Forms of Calcium in Prunus humilis

MA Jian-jun^1,2; ZHANG Li-bin¹; YU Feng-ming¹; XU Xue-feng^2*

(¹ Hebei Normal University of Science and Technology, Qinhuangdao, Hebei 066004, China; ² Fruit Stress Physiology and Molecular Biology Laboratory, China Agricultural Univerity, Beijing 100094, China)

Received:1900-01-01 Revised:1900-01-01 Online:2007-06-25 Published:2007-06-25

Abstract

Abstract: In order to exp lore the characteristic of calcium content variation and distribution in different
tissues, and the mechanism of higher calcium content in Chinese dwarf cherry ( Prunus humilis) fruit, differ
ent kinds of calcium contents, which were extracted by sequential extraction p rocedure, were analyzed during
the fruit development. The results showed that the accumulation of calcium in fruits appeared in two periods,
one was the mitotic period of young fruits, which appeared in 45 d after flowering and the accumulation amount
accounted for 69.39% of the single fruit calcium; the other appeared in the period of cell swelling and lasted
for about 30 d, calcium pectate was the main form in the mitotic period, while the soluble calcium was the
main form in the swelling period. The order of calcium contents in different parts of P. humilis fruits was as
follows: pulp > p it kernel > p it hull, which accounted for 72.50% , 15.94% and 11.56% of the total calcium
contents, respectively. The order of calcium forms accumulated in fruitswas as follows: soluble calcium > cal
cium pectate > calcium phosphate > calcium oxalate > residual calcium, and active calcium ( including soluble
calcium and calcium pectate) accounted for 69.87% of the total calcium contents. It was concluded that ac
tive calcium was the main form of calcium absorp tion, transportation and accumulation, and it also became the
main reason for the characterization of higher calcium contents in P. hum ilis fruit. The ratio of different kinds
of calcium in grafting tree had no significant change.

Key words: Chinese dwarf cherry, Prunus humilis, Fruit, Calcium forms, Distribution

MA Jian-jun;ZHANG Li-bin;YU Feng-ming;XU Xue-feng. Contents and Distribution of Different Forms of Calcium in Prunus humilis[J]. ACTA HORTICULTURAE SINICA, 2007, 34(3): 755-759.

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Contents and Distribution of Different Forms of Calcium in Prunus humilis

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