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Abstract Detail

Seed Biology

Wu, Zikai [1].

Analysis of Several Traits of Seeds in Micpo-endosperm Corn.

A new type of corn (Zea mays L.) germplasm which only has a little amount of endosperm (in fact only have aleurone layer in seeds) has been selected since 1994, which named micro-endosperm corn (abb. MEC). The ratio of embryo/kernel in dry seeds is usually equal to or greater than 30%, or even greater than 50%. To investigate the value of MEC in science and agricultural production an extensive analysis was performed. The results are as follows. The single kernel weight of MEC was dispersed from 0.04g to 0.16g. The ratio of embryo/kernel in weight of dry seeds was about 20.56% to 52.60%. The structure of kernel in the microscopy showed that very little endosperm was visible in the maturated kernels of MEC, or even invisible endosperm except of aleurone layer. The aleurone layers in MEC kernels were thicker than that in the other types of corn, such as high oil corn, flint corn, sweet corn. The total content of soluble sugar of kernel in MEC from 18d to 24d after pollination was usually higher than that in super sweet corn, respectively. The oil content in MEC was about 5.85% to 33.1% in single maturated kernel and 10.13% to 27.62% in corn ears, which were higher than that in the other type of corn including the high oil corn. The oil content of kernel which the embryo removed in MEC was about 6.21% to 12.92% which were also higher than that in other type of corn. To investigate the accumulating of endosperm of seeds in MEC, the kernel samples were taken weekly from the 7 days after pollination to date of kernel maturated and were weighted. The results showed that the highest weight of dry kernels in MEC was found in 35 days after pollination and then the dry kernel weight was slowly decreased during the date of 36th to kernel maturated.

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1 - Guangxi University, Agricultural College, 7861# East Campus, Guangxi University, No.76 Xiuling Road, Nanning, Guangxi, 530005, P.R.China

structural biology

Presentation Type: Plant Biology Abstract
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P29007
Abstract ID:461

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