印度梨形孢真菌诱导提高花生抗旱性研究初报

Preliminary study on conferring drought tolerance of peanut by Piriformospora indica fungi

将印度梨形孢真菌(Piriformospora indica)接种于受不同干旱胁迫花生幼苗根部,研究接种该真菌对花生抗旱性的影响。试验设置3个处理,分别是:接菌+干旱胁迫处理、未接菌+干旱胁迫处理、未接菌+未干旱胁迫处理(CK)。试验结果表明:接菌+干旱处理后的花生主根长、根鲜重、根干重、茎鲜重、茎干重、叶鲜重、叶干重、叶绿素含量(SPAD值)等农艺性状表现分别为14.96 cm、0.64 g、0.08 g、1.48 g、0.20 g、1.61 g、0.29 g、42.63。与未接菌+干旱处理相比均显著增加,增幅分别为26.8%、25.50%、60%、15.63%、17.65%、15.59%、26.09%、7.43%。与对照相比,在主根长、根鲜重、根干重、茎干重、叶干重、叶绿素含量(SPAD值)等性状方面均没有显著性变化。以上结果说明:在干旱胁迫条件下,接种印度梨形孢真菌能够维持花生正常生长,使得花生从植株外部形态上表现出较强的抗旱性。

Piriformospora indica fungi were inoculated on seedling roots of peanut to investigate their effects on drought tolerance.There were 3 treatments including inoculation＋drought,no inoculation＋drought,and no inoculation＋no drought（CK） in the experiment.The results showed that the length of taproots,fresh weight of roots,dry weight of roots,fresh weight of stems, dry weight of stems,fresh weight of leaves,dry weight of leaves and chlorophyll content（SPAD） under inoculation＋drought treatment were 14.96 cm,0.64 g,0.08 g,1.48 g,0.20 g,1.61 g,0.29 g and 42.63 respectively,and significantly increased by 26.8%,25.50%,60%,15.63%,17.65%,15.59%,26.09% and 7.43% respectively,compared with no inoculation＋drought treatment.Meanwhile,there was no significant difference between inoculation＋drought treatment and CK in the agronomic traits of length of taproots,fresh weight of roots,dry weight of roots,dry weight of stems,dry weight of leaves and chlorophyll content（SPAD）.These results suggested that Piriformospora indica fungi could maintain normal growth of peanut in drought stress conditions,and improve drought tolerance of peanut plants.