Abstract
Kappaphycus alvarezii (Doty) Doty ex. P. C. Silva is one of the most important sources of raw material for the carrageenan industry (Ask & Azanza 2002). In Brazil, onlyHypneamusciformis (Wulfen) J.V. Lamouroux is used as raw material and its natural stocks are not su⁄cient to supply the Brazilian demand (Bulboa & Paula 2005; Reis, Yoneshigue-valentin & Santos 2008). This was one of the reasons why, in 1995, K. alvarezii was introduced at the Brazilian Southeastern coast, in Sa o Paulo State (Bulboa & Paula 2005). The carrageenan yield (CY) can change in accordance to environmental parameters as a mechanism of prevention against stressful situations like salinity £uctuations (Hayashi, Oliveira, Bleicher-lhonneur, Boulenguer, Pereira,Von Seckendori, Shimoda, Le£amand,Valle¤ e & Critchley 2007; Reis et al. 2008). Few works discuss the salinity eiects on daily growth rate (DGR) and CYof eucheumatoids in spite of its importance (Ask & Azanza 2002).This information could help the identi¢cation of good sites for cultivation and would help mitigation activities (Ask, Batibasaga, Zertuche-gonzaŁ lez & De San 2003).Thus, the aim of this study was to analyse the eiect of the salinity on DGRand CYvalues of K. alvarezii in vitro.
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