NaCl胁迫下腐植酸浸种对番茄种子发芽的影响

Effects of Humic Acid Pretreatment on Germination of Tomato Seeds under Na Cl Stress

以"金棚8号"番茄品种为实验材料,探讨在Na Cl胁迫下不同稀释倍数的高活性腐植酸液剂对番茄种子萌发的影响。实验结果表明:Na Cl胁迫对番茄种子萌发具有抑制作用。在150 mmol/L Na Cl胁迫下,适宜浓度的高活性腐植酸液剂能够缓解Na Cl胁迫,提高番茄种子发芽势、发芽率、发芽指数、活力指数、胚根长、下胚轴长,降低胚根内丙二醛(MDA)含量,其中700倍高活性腐植酸稀释液作用效果最好。

The effects of different dilution ratio of high active humic acid on germination of tomato seeds under NaCl stress were studied by using ＂Jinpeng No.8＂ as the test material. The results showed that the NaCl stress had inhibitory effect on tomato seeds germination. Under the 150 mmol/L NaCl stress, the appropriate concentration of high active humic acid could relieve NaCl stress to increasing the germination potential, germination rate, germination index, vigor index, radicle length and hypocotyl length of tomato seeds and decreasing the content of malondialdehyde（MDA） in radicle. The optimal effects were observed when the high active humic acid was diluted 700 times.