Aluminum tolerance and aluminum-induced deposition of callose and lignin in the root tips of Melaleuca and Eucalyptus species
Aluminum tolerance and aluminum-induced deposition of callose and lignin in the root tips of Melaleuca and Eucalyptus species
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DOI：
10.1007/s10310-005-0153-z
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发表时间：
2005-08
影响因子：
1.5
通讯作者：
Ko Tahara;M. Norisada;T. Hogetsu;K. Kojima
中科院分区：
文献类型：
--
作者：
Ko Tahara;M. Norisada;T. Hogetsu;K. Kojima
以9种桃金娘科植物（Melaleuca bracteataF.穆勒，白千层（Melaleuca cajuputiPowell）、白千层（Melaleuca glomerataF.）穆勒，白千层[L.] L.，五脉白千层S.T. Blake，Melaleuca viridifloraSol.来自Gaertner，赤桉，桉树，和巨桉Eucalyptus grandis W. Hill ex Maiden）与1 mM Al在营养液中接触24 h或20天，以评估它们对过量Al的敏感性，并确定胼胝质和木质素的形成是否可用作Al敏感性的种间指标。铝对根伸长的抑制作用因树种而异。cajuputi、E. grandis，M. quinquenervia和E. deglupta对1 mM Al的耐受性最强，而绿花海棠、E. camaldulensis，M. glomerata和M.结果表明，Al诱导了3种植物根尖中胼胝质的形成，而木质素只在Al最敏感的植物M.苞片。在1 mM铝根伸长与铝诱导的胼胝质的形成呈负相关，但不与铝诱导的木质素在根尖形成。这些结果表明，铝诱导的胼胝质的形成，而不是木质素的形成，可以用作铝敏感性的种间指标。
We exposed the roots of nine Myrtaceae species (Melaleuca bracteataF. Muell.,Melaleuca cajuputiPowell,Melaleuca glomerataF. Muell.,Melaleuca leucadendra[L.] L.,Melaleuca quinquenervia[Cav.] S.T. Blake,Melaleuca viridifloraSol. ex Gaertner,Eucalyptus camaldulensisDehnh.,Eucalyptus degluptaBl., andEucalyptus grandisW. Hill ex Maiden) to 1 mM Al in a nutrient solution for either 24 h or 20 days to evaluate their sensitivity to excess Al and to determine whether callose and lignin formation can be used as interspecific indicators of Al sensitivity. Inhibition of root elongation by Al varied among the species.Melaleuca leucadendra, M. cajuputi, E. grandis, M. quinquenervia, andE. degluptawere tolerant to 1 mM Al, whereasM.viridiflora, E. camaldulensis, M. glomerata, andM. bracteatawere sensitive to 1 mM Al. We found that Al induced callose formation in the root tips of each species, but lignin was formed only in the root tips of the most sensitive species,M. bracteata. Root elongation at 1 mM Al was negatively correlated with Al-induced callose formation but not with the Al-induced lignin formation in the root tips. These results suggest that Al-induced callose formation, rather than lignin formation, can be used as an interspecific indicator of Al sensitivity.