Abstract
Quercus acutissima Carruth. is one of the most economically important deciduous tree species in Korea. The acorns of Q. acutissima are used for both food and medicinal purposes in Korea and China. In this study, we analyzed plant hormones and metabolite profiles to identify their correlation with the yield production of Q. acutissima. The contents of sucrose and inositol in the leaves of high-yield clones were significantly higher (p < 0.05) than those of low-yield clones. In addition, high-yield clones have a higher content of phosphoric acid, succinic acid, malic acid, and butane-1,3-diol in stems compared with low-yield clones. Among the identified metabolites, zeatin-9-glucoside showed highly significant negative correlations with tree height, crown volume, and acorn production. It is considered that these metabolites could be useful metabolic markers for the selection of a high yield clone of Q. acutissima.
Highlights
Quercus acutissima Carruth. is an Asian oak tree native to Korea, China, and Japan and it is a keystone species in these countries [1]
The number of fruiting acorns per tree has been observed annually and morphologically differentiated; six high-yielding clones and six low-yielding clones of oak trees were investigated from the clonal seed orchard
Our results show that several metabolites have the yield and quality of crop species [30]
Summary
Quercus acutissima Carruth. is an Asian oak tree native to Korea, China, and Japan and it is a keystone species in these countries [1]. Is an Asian oak tree native to Korea, China, and Japan and it is a keystone species in these countries [1]. In Korea, the Q. acutissima is one of the most economically and ecologically valuable deciduous tree species, its standing volume making up nearly. Q. acutissima (sawtooth oak) acorns are consumed in several Asian countries including Korea and China as traditional food and medicine resources [3]. A seed orchard is a stand that consists of genetically improved trees. It is one of the important seed sources for seed production and forest plantation. Clonal seed orchards (CSOs) of Q. acutissima with grafted trees of superior phenotypes have been established and managed by the government to produce abundant seeds of a high genetic quality
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