
硼对铝胁迫下油菜幼苗生长及生理特性的影响
张雅茹, 闫磊, 程锦, 曾紫君, 侯佳玉, 鲁克嵩, 姜存仓
中国油料作物学报 ›› 2023, Vol. 45 ›› Issue (1) : 138-147.
硼对铝胁迫下油菜幼苗生长及生理特性的影响
Effects of boron on growth and physiological characteristics of rape seedlings under aluminum stress
为探索硼对油菜(Brassica napus)幼苗铝胁迫的缓解作用,以品种中油杂28为材料,设置2个硼浓度(0.25,25 µmol/L),5个铝浓度(0、50、100、200、400 µmol/L),研究硼对铝胁迫下油菜幼苗生长及生理特性的影响。结果表明:铝胁迫明显抑制油菜幼苗生长,增加膜脂过氧化的产物丙二醛的含量,显著减少叶绿素的含量,进而减少了油菜的生物量。铝胁迫下,相较于低硼处理,加硼显著增加油菜根系的可溶性蛋白、脯氨酸、谷胱甘肽含量,同时降低了铝在油菜体内的积累;且促进合成叶绿素所需的镁元素的吸收,增加油菜的生物量。综上,铝胁迫显著抑制油菜的生长,提高膜脂过氧化程度,加硼不仅弥补了硼不足的问题,同时还可以通过调节抗氧化剂系统,提高蛋白质、脯氨酸含量的积累来抵御铝胁迫。
To better understand alleviating effect of boron (B) on aluminum (Al) stress of rapeseed (Brassica napus) seedlings, Zhongyouza 28 was used as experimental material, and 2 B (0.25, 25 µmol/L), 5 Al (0, 50, 100, 200, 400 µmol/L) were used as treatments. Results showed that Al stress significantly inhibited the growth of rape seedlings, increased the content of malondialdehyde, and product of membrane lipid peroxidation, significantly reduced the content of chlorophyll, and thus reduced the biomass. Under Al stress, compared with low B treatment, B addition significantly increased the contents of soluble protein, proline and glutathione in roots, decreased Al accumulation, promoted the absorption of magnesium to synthesize chlorophyll and increased the biomass of rape. In conclusion, Al stress could significantly inhibit rapeseed growth and improve the degree of membrane lipid peroxidation. While B addition could not only make up for the lack of B, but also resist Al stress by regulating antioxidant system and increasing accumulation of protein and proline content.
硼 / 铝胁迫 / 油菜 / 丙二醛 / 抗坏血酸 / 谷胱甘肽 {{custom_keyword}} /
boron / aluminum stress / rapeseed / malondialdehyde / ascorbic acid / glutathione {{custom_keyword}} /
图1 硼对铝胁迫下油菜幼苗长势的影响Fig. 1 Effects of B on growth of rape seedlings under Al stress |
表1 硼对铝胁迫下油菜生长指标的影响Table 1 Effects of B on growth indexes of rape under Al stress |
处理 Treatment | 株高 Plant height /cm | 根长 Root length /cm | 地上部 Shoot /g | 根 Root /g | 总质量 TW /g | ||||
---|---|---|---|---|---|---|---|---|---|
鲜重 FW | 干重 DW | 鲜重 FW | 干重 DW | 总鲜重 TFW | 总干重 TDW | ||||
-B | Al-0 Al-50 Al-100 Al-200 Al-400 | 21.67b 21.23bc 19.83bc 19.57bc 18.33d | 22.67ab 22.25abc 19.00de 18.67de 17.67e | 8.15de 8.99cd 7.68ef 6.46f 6.46f | 0.74bc 0.61d 0.55de 0.46f 0.51ef | 1.21cde 1.30bcd 1.04def 0.72f 0.78ef | 0.07bcd 0.07cde 0.06cde 0.04e 0.05de | 9.36de 10.29cd 8.72ef 7.18g 7.24fg | 0.81bc 0.68d 0.61de 0.51f 0.56ef |
+B | Al-0 Al-50 Al-100 Al-200 Al-400 | 25.67a 26.75a 27.95a 27.00a 26.97a | 24.25a 22.10abc 20.87bcd 20.58bcd 20.00cde | 11.37b 9.46c 13.21a 11.07b 7.13ef | 0.79b 0.69c 0.90a 0.72bc 0.55de | 1.42bcd 1.77b 1.64c 2.23a 1.38bcd | 0.11a 0.09abc 0.09abc 0.10ab 0.08bcd | 12.79b 11.22c 14.85a 13.30b 8.51efg | 0.90ab 0.78f 0.99a 0.82bc 0.63de |
表2 硼对铝胁迫下油菜根系形态的影响Table 2 Root morphology under Al stress with or without B |
处理 Treatment | 总根长 /cm Total root length | 根系总表面积 /cm2 Total root surface area | 平均直径 /mm Average diameter | 体积 /cm3 Volume | |
---|---|---|---|---|---|
-B | Al-0 | 573.6bc | 115.4b | 0.64bcde | 1.85abc |
Al-50 | 532.0cd | 117.2b | 0.70ab | 2.07ab | |
Al-100 | 539.4cd | 98.8bc | 0.59de | 1.44bcd | |
Al-200 | 379.5d | 71.7bc | 0.60cde | 1.08d | |
Al-400 | 370.5d | 74.8bc | 0.64bcde | 1.20cd | |
+B | Al-0 | 841.5a | 162.6a | 0.61bcde | 2.51a |
Al-50 | 743.4ab | 133.1ab | 0.57e | 1.90abc | |
Al-100 | 569.6c | 120.1b | 0.67abcd | 2.02ab | |
Al-200 | 580.9bc | 133.3ab | 0.73a | 2.44a | |
Al-400 | 587.6bc | 126.7ab | 0.69abc | 2.22a |
表3 硼对铝胁迫下油菜叶片光合色素的影响Table 3 Effects of B on photosynthetic pigments in rape leaves under Al stress |
处理 Treatment | 叶绿素a /(mg/g FW) Chlorophyll a | 叶绿素b /(mg/g FW) Chlorophyll b | 类胡萝卜素 /(mg/g FW) Carotenoids | |
---|---|---|---|---|
-B | Al-0 | 2.487bc | 2.168a | 0.147bcd |
Al-50 | 2.135cde | 2.161a | 0.136cde | |
Al-100 | 1.878efg | 1.832bc | 0.042ef | |
Al-200 | 2.034def | 1.827bc | 0.088def | |
Al-400 | 1.489g | 1.600cd | 0.001f | |
+B | Al-0 | 2.439bcd | 1.895b | 0.182bcd |
Al-50 | 2.554bc | 1.711bc | 0.247ab | |
Al-100 | 3.336a | 2.225a | 0.318a | |
Al-200 | 2.588b | 1.782bc | 0.235abc | |
Al-400 | 1.699fg | 1.468d | 0.099def |
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