a1a1afb0bdb84862770c89bba910c41a diversity_a2016v8n4p26.pdf e94c01e45dc96f85cface56bda9a179ad40d4aab diversity_a2016v8n4p26.pdf cecf3a4a702ff4c59321a96089ddc07feab198a08f41c4489851486ffad8dd48 diversity_a2016v8n4p26.pdf Title: Differential Physiological Responses of Portuguese Bread Wheat (Triticum aestivum L.) Genotypes under Aluminium Stress Subject: The major limitation of cereal production in acidic soils is aluminium (Al) phytotoxicity which inhibits root growth. Recent evidence indicates that different genotypes within the same species have evolved different mechanisms to cope with this stress. With these facts in mind, root responses of two highly Al tolerant Portuguese bread wheat genotypes—Barbela 7/72/92 and Viloso mole—were investigated along with check genotype Anahuac (Al sensitive), using different physiological and histochemical assays. All the assays confirmed that Barbela 7/72/92 is much more tolerant to Al phytotoxicity than Viloso Mole. Our results demonstrate that the greater tolerance to Al phytotoxicity in Barbela 7/72/92 than in Viloso Mole relies on numerous factors, including higher levels of organic acid (OAs) efflux, particularly citrate efflux. This might be associated with the lower accumulation of Al in the root tips, restricting the Al-induced lipid peroxidation and the consequent plasma membrane integrity loss, thus allowing better root regrowth under Al stress conditions. Furthermore, the presence of root hairs in Barbela 7/72/92 might also help to circumvent Al toxicity by facilitating a more efficient uptake of water and nutrients, particularly under Al stress on acid soils. In conclusion, our findings confirmed that Portuguese bread wheat genotype Barbela 7/72/92 represents an alternative source of Al tolerance in bread wheat and could potentially be used to improve the wheat productivity in acidic soils. Keywords: aluminium stress; bread wheat; phytotoxicity; physiological; histochemical assays Author: Ana Luísa Garcia-Oliveira, Paula Martins-Lopes, Roser Tolrà, Charlotte Poschenrieder, Henrique Guedes-Pinto and César Benito Creator: LaTeX with hyperref package Producer: pdfTeX-1.40.15 CreationDate: Thu Dec 8 16:46:52 2016 ModDate: Thu Dec 8 16:46:52 2016 Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 12 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 1546170 bytes Optimized: no PDF version: 1.5 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- KGLYAT+URWPalladioL-Ital Type 1 Custom yes yes no 98 0 WZKUEH+URWPalladioL-Bold Type 1 Custom yes yes no 99 0 MHRYLJ+URWPalladioL-BoldItal Type 1 Custom yes yes no 100 0 XLRGMC+URWPalladioL-Roma Type 1 Custom yes yes no 101 0 BTHOLA+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 105 0 KVEXVN+CMSY10 Type 1 Builtin yes yes no 129 0 OVNEXW+EURM10 Type 1 Builtin yes yes no 130 0 NHMEAO+PalatinoLinotype CID TrueType Identity-H yes yes yes 169 0 NHMEPC+TimesNewRoman TrueType WinAnsi yes yes no 170 0 NHMEAP+PalatinoLinotype TrueType WinAnsi yes yes no 171 0 NHMEFP+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 172 0 NHMEHB+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 173 0 NHMEAO+PalatinoLinotype CID TrueType Identity-H yes yes yes 204 0 NHMEPC+TimesNewRoman TrueType WinAnsi yes yes no 205 0 NHMEAP+PalatinoLinotype TrueType WinAnsi yes yes no 206 0 NHMEFP+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 207 0 NHMEHB+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 208 0 NHMEAO+PalatinoLinotype CID TrueType Identity-H yes yes yes 240 0 NHMEPC+TimesNewRoman TrueType WinAnsi yes yes no 241 0 NHMEAP+PalatinoLinotype TrueType WinAnsi yes yes no 242 0 NHMEFP+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 243 0 NHMEHB+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 244 0 NHMEAO+PalatinoLinotype CID TrueType Identity-H yes yes yes 275 0 NHMEPC+TimesNewRoman TrueType WinAnsi yes yes no 276 0 NHMEAP+PalatinoLinotype TrueType WinAnsi yes yes no 277 0 NHMEFP+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 278 0 NHMEHB+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 279 0 Jhove (Rel. 1.6, 2011-01-04) Date: 2017-02-15 02:26:07 CET RepresentationInformation: diversity_a2016v8n4p26.pdf ReportingModule: BYTESTREAM, Rel. 1.3 (2007-04-10) LastModified: 2017-02-14 16:55:19 CET Size: 1546170 Format: bytestream Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/octet-stream Checksum: 57e7f63e Type: CRC32 Checksum: a1a1afb0bdb84862770c89bba910c41a Type: MD5 Checksum: e94c01e45dc96f85cface56bda9a179ad40d4aab Type: SHA-1