Reserve carbohydrates and lipids from the seeds of four tropical tree species with different sensitivity to desiccation

Brazilian Archives of Biology and Technology

Juliana Iura De Oliveira Mello²  Claudio José Barbedo²  Antonio Salatino¹  Rita De Cássia Leone Figueiredo-ribeiro² 

[1] ,Secretaria do Meio Ambiente do Estado de São Paulo Instituto de Botânica São Paulo SP ,Brasil

关键词: Desiccation tolerance;    Fatty acids;    Seeds;    Starch;    Sugars;   

DOI  :  10.1590/S1516-89132010000400019

来源: SciELO

【 摘 要 】

Considering the importance of water content for the conservation and storage of seeds, and the involvement of soluble carbohydrates and lipids for embryo development, a comparative study was carried out among the seeds of Inga vera (ingá), Eugenia uniflora (pitanga), both classified as recalcitrant, and Caesalpinia echinata (brazilwood) and Erythrina speciosa (mulungu), considered as orthodox seeds. Low concentrations of cyclitols (0.3-0.5%), raffinose family oligosaccharides (ca. 0.05%) and unsaturated fatty acids (0-19%) were found in the seeds of ingá and pitanga, while larger amounts of cyclitols (2-3%) and raffinose (4.6-13%) were found in brazilwood and mulungu, respectively. These results, in addition to higher proportions of unsaturated fatty acids (53-71%) in orthodox seeds, suggested that sugars and lipids played important role in water movement, protecting the embryo cell membranes against injuries during dehydration.

【 授权许可】

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