中国水稻科学 ›› 2018, Vol. 32 ›› Issue (5): 485-492.DOI: 10.16819/j.1001-7216.2018.7123
陈苏1, 谢建坤1, 黄文新2, 陈登云3, 彭晓剑4, 付学琴1,*()
收稿日期:
2017-10-10
修回日期:
2017-12-15
出版日期:
2018-09-10
发布日期:
2018-09-10
通讯作者:
付学琴
基金资助:
Su CHEN1, Jiankun XIE1, Wenxin HUANG2, Dengyun CHEN3, Xiaojian PENG4, Xueqin FU1,*()
Received:
2017-10-10
Revised:
2017-12-15
Online:
2018-09-10
Published:
2018-09-10
Contact:
Xueqin FU
摘要:
【目的】本研究旨在探究植物根际促生菌蜡状芽孢杆菌F06菌株对不同干旱胁迫下水稻汕优63生理特性的影响。【方法】在盆栽试验条件下,以水稻汕优63为种植材料,研究了轻度(LD)、中度(MD)、重度(SD)3个干旱强度下接种蜡样芽孢杆菌(Bacillus cereus)F06对水稻生理特征的影响。【结果】与正常水分管理相比,干旱胁迫(DS)下水稻叶片光合速率(Pn)和气孔导度(gs)逐渐降低;而干旱胁迫下接种F06可显著减缓Pn和gs下降,与不接种(NP)处理相比,Pn和gs分别增加7.67%、12.97%、18.14%和11.51%、16.63%、17.07%,且呈现出随着干旱胁迫程度的提高,增幅增大的趋势。干旱胁迫下水稻叶片初始荧光(Fo)、非荧光淬灭系数(NPQ)显著上升,最大光化学效率(Fv/Fm)、光化学猝灭系数(qP)显著下降;而干旱胁迫下接种F06可显著抑制Fo、NPQ升高和Fv/Fm、qP降低,明显改善水稻叶片光能转换效率。干旱胁迫下接种F06虽然不能改变叶片水势、相对含水量和相对电导率的变化趋势,但可以有效降低其变幅。正常水分处理下接种F06虽然没有增加光合色素含量,但干旱环境下显著抑制了光合色素的分解或降低。干旱显著降低了水稻叶片和根系细胞分裂素(CTK)含量,增加了叶片中脱落酸(ABA)的含量;在干旱胁迫下,接种F06可显著提高叶片和根系中CTK的含量。【结论】由此可见,干旱生境下接种F06,可调节植物体内的激素含量,减少干旱胁迫下光合色素的分解或流失,提高光合速率,增强水稻在干旱环境中的适应能力。
中图分类号:
陈苏, 谢建坤, 黄文新, 陈登云, 彭晓剑, 付学琴. 根际促生细菌对干旱胁迫下水稻生理特性的影响[J]. 中国水稻科学, 2018, 32(5): 485-492.
Su CHEN, Jiankun XIE, Wenxin HUANG, Dengyun CHEN, Xiaojian PENG, Xueqin FU. Effects of Plant Growth-promoting Rhizobacteria(PGPR) on Physiological Characteristics of Rice Under Drought Stress[J]. Chinese Journal OF Rice Science, 2018, 32(5): 485-492.
干旱处理 Drought stress | 光合速率 Photosynthetic rate/(µmol·m-2s-1) | 气孔导度 Stomatal conductance/(mmol·m-2s-1) | 胞间CO2浓度 Intercellular CO2 concentration/(µmol·mol-1) | |||||
---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | |||
CK | 27.25±1.26 a | 28.71±2.84 a | 256.69±11.54 a | 283.32±12.67 a | 227.18±29.89 bc | 229.12±14.20 b | ||
LD | 25.94±2.02 ab | 27.93±1.16 a | 234.35±18.90 a | 261.33±10.18 a | 191.78±16.34 c | 216.05±11.32 b | ||
MD | 23.06±1.37 b | 26.05±3.12 ab | 195.17±15.27 b | 227.62±23.14 b | 235.22±10.71 b | 209.38±18.17 c | ||
SD | 18.91±1.18 c | 22.34±2.41 b | 165.28±20.77 c | 193.49±15.63 c | 268.53±21.44 a | 252.68±8.95 a |
表1 不同处理对水稻叶片光合参数的影响
Table 1 Effects of different treatments on photosynthetic parameters of rice leaves.
干旱处理 Drought stress | 光合速率 Photosynthetic rate/(µmol·m-2s-1) | 气孔导度 Stomatal conductance/(mmol·m-2s-1) | 胞间CO2浓度 Intercellular CO2 concentration/(µmol·mol-1) | |||||
---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | |||
CK | 27.25±1.26 a | 28.71±2.84 a | 256.69±11.54 a | 283.32±12.67 a | 227.18±29.89 bc | 229.12±14.20 b | ||
LD | 25.94±2.02 ab | 27.93±1.16 a | 234.35±18.90 a | 261.33±10.18 a | 191.78±16.34 c | 216.05±11.32 b | ||
MD | 23.06±1.37 b | 26.05±3.12 ab | 195.17±15.27 b | 227.62±23.14 b | 235.22±10.71 b | 209.38±18.17 c | ||
SD | 18.91±1.18 c | 22.34±2.41 b | 165.28±20.77 c | 193.49±15.63 c | 268.53±21.44 a | 252.68±8.95 a |
干旱处理 Drought stress | 初始荧光 PSⅡ original fluorescence(Fo) | 最大光化学效率 Maximum photochemical efficiency(Fv/Fm) | 光化学猝灭系数 Photochemical quenching Coefficient(qP) | 非光化学猝灭系数 Non-photochemical quenching Coefficient(NPQ) | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | NP | F06 | ||||
CK | 149.06±9.78 d | 150.18±12.62 c | 0.89±0.04 a | 0.90±0.03 a | 0.75±0.04 a | 0.75±0.02 a | 1.70±0.04 c | 1.70±0.06 c | |||
LD | 162.19±12.78 c | 154.44±19.41 bc | 0.80±0.01 ab | 0.86±0.02 ab | 0.64±0.02 ab | 0.63±0.02 b | 1.77±0.05 b | 1.76±0.05 c | |||
MD | 178.34±14.21 b | 167.06±10.89 b | 0.73±0.02 b | 0.79±0.01 b | 0.60±0.02 b | 0.52±0.03 c | 1.80±0.03 b | 1.98±0.03 b | |||
SD | 192.18±16.74 a | 178.03±11.36 a | 0.52±0.01 c | 0.61±0.02 c | 0.51±0.01 c | 0.38±0.00 d | 2.06±0.07 a | 2.24±0.06 a |
表2 不同处理对水稻叶片叶绿素荧光参数的影响
Table 2 Effect of different treatments on chlorophyll fluorescence parameters of rice leaves.
干旱处理 Drought stress | 初始荧光 PSⅡ original fluorescence(Fo) | 最大光化学效率 Maximum photochemical efficiency(Fv/Fm) | 光化学猝灭系数 Photochemical quenching Coefficient(qP) | 非光化学猝灭系数 Non-photochemical quenching Coefficient(NPQ) | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | NP | F06 | ||||
CK | 149.06±9.78 d | 150.18±12.62 c | 0.89±0.04 a | 0.90±0.03 a | 0.75±0.04 a | 0.75±0.02 a | 1.70±0.04 c | 1.70±0.06 c | |||
LD | 162.19±12.78 c | 154.44±19.41 bc | 0.80±0.01 ab | 0.86±0.02 ab | 0.64±0.02 ab | 0.63±0.02 b | 1.77±0.05 b | 1.76±0.05 c | |||
MD | 178.34±14.21 b | 167.06±10.89 b | 0.73±0.02 b | 0.79±0.01 b | 0.60±0.02 b | 0.52±0.03 c | 1.80±0.03 b | 1.98±0.03 b | |||
SD | 192.18±16.74 a | 178.03±11.36 a | 0.52±0.01 c | 0.61±0.02 c | 0.51±0.01 c | 0.38±0.00 d | 2.06±0.07 a | 2.24±0.06 a |
干旱处理 Drought stress | 水势 Water potential/MPa | 相对含水量 Relative water content/% | 相对电导率 Relative electrolyte leakage/% | |||||
---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | |||
CK | –0.91±0.03 a | –0.91±0.02 a | 84.16±3.25 a | 84.52±6.27 a | 6.83±0.55 c | 6.81±0.34 c | ||
LD | –1.02±0.06 b | –0.93±0.05 a | 79.52±5.29 b | 82.80±4.22 a | 7.14±0.35 c | 6.92±0.41 c | ||
MD | –1.15±0.06 c | –1.07±0.04 b | 70.87±8.09 c | 76.33±6.30 b | 8.31±0.27 b | 7.52±0.17 b | ||
SD | –1.27±0.05 d | –1.16±0.04 c | 61.82±5.77 d | 67.27±7.06 c | 9.45±0.67 a | 8.48±0.19 a |
表3 不同处理对水稻叶片水势、相对含水量和相对电导率的影响
Table 3 Effect of different treatments on water potential, relative water content and relative electrolyte leakage of rice leaves.
干旱处理 Drought stress | 水势 Water potential/MPa | 相对含水量 Relative water content/% | 相对电导率 Relative electrolyte leakage/% | |||||
---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | |||
CK | –0.91±0.03 a | –0.91±0.02 a | 84.16±3.25 a | 84.52±6.27 a | 6.83±0.55 c | 6.81±0.34 c | ||
LD | –1.02±0.06 b | –0.93±0.05 a | 79.52±5.29 b | 82.80±4.22 a | 7.14±0.35 c | 6.92±0.41 c | ||
MD | –1.15±0.06 c | –1.07±0.04 b | 70.87±8.09 c | 76.33±6.30 b | 8.31±0.27 b | 7.52±0.17 b | ||
SD | –1.27±0.05 d | –1.16±0.04 c | 61.82±5.77 d | 67.27±7.06 c | 9.45±0.67 a | 8.48±0.19 a |
干旱处理 Drought stress | 叶绿素a含量 Chlorophyll a content/(mg·g-1) | 叶绿素b含量 Chlorophyll b content/(mg·g-1) | 类胡萝卜素含量 Carotenoid content/(mg·g-1) | |||||
---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | |||
CK | 3.65±0.04 a | 3.66±0.14 a | 0.86±0.00 a | 0.87±0.02 a | 1.22±0.02 a | 1.21±0.03 a | ||
LD | 3.61±0.05 a | 3.52±0.06 a | 0.85±0.03 a | 0.86±0.03 a | 1.17±0.01 a | 1.24±0.02 a | ||
MD | 3.55±0.01 a | 3.48±0.06 a | 0.84±0.01 a | 0.84±0.01 a | 0.91±0.01 b | 1.19±0.02 a | ||
SD | 3.08±0.06 b | 3.39±0.05 a | 0.78±0.01 b | 0.82±0.01 a | 0.73±0.02 c | 0.97±0.01 b |
表4 不同处理对水稻叶片光合色素含量的影响
Table 4 Effect of different treatments on photosynthetic pigment contents of rice leaves.
干旱处理 Drought stress | 叶绿素a含量 Chlorophyll a content/(mg·g-1) | 叶绿素b含量 Chlorophyll b content/(mg·g-1) | 类胡萝卜素含量 Carotenoid content/(mg·g-1) | |||||
---|---|---|---|---|---|---|---|---|
NP | F06 | NP | F06 | NP | F06 | |||
CK | 3.65±0.04 a | 3.66±0.14 a | 0.86±0.00 a | 0.87±0.02 a | 1.22±0.02 a | 1.21±0.03 a | ||
LD | 3.61±0.05 a | 3.52±0.06 a | 0.85±0.03 a | 0.86±0.03 a | 1.17±0.01 a | 1.24±0.02 a | ||
MD | 3.55±0.01 a | 3.48±0.06 a | 0.84±0.01 a | 0.84±0.01 a | 0.91±0.01 b | 1.19±0.02 a | ||
SD | 3.08±0.06 b | 3.39±0.05 a | 0.78±0.01 b | 0.82±0.01 a | 0.73±0.02 c | 0.97±0.01 b |
干旱处理 Drought stress | 细胞分裂素含量 Cytokinin content/(ng·g-1) | 脱落酸含量 Abscisic acid content/(ng·g-1) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
叶片 Leaf | 根系 Root | 叶片 Leaf | 根系 Root | ||||||||
NP | F06 | NP | F06 | NP | F06 | NP | F06 | ||||
CK | 180.32±24.50 a | 266.36±13.56 a | 31.34±2.12 a | 43.14±2.74 a | 423.56±65.56 c | 432.49±43.11 c | 448.34±32.16 a | 568.33±35.17 a | |||
LD | 159.02±19.63 b | 245.45±12.28 ab | 29.93±3.84 ab | 42.70±2.91 a | 438.05±22.49 c | 444.64±38.63 c | 440.99±22.98 a | 502.33±34.65 ab | |||
MD | 123.70±16.32 c | 153.92±18.58 b | 25.33±1.47 b | 36.06±3.09 b | 472.24±35.63 b | 498.86±51.26 b | 443.32±45.23 a | 491.03±26.54 b | |||
SD | 93.83±10.61 d | 118.35±16.07 c | 20.76±3.61 c | 29.15±1.58 c | 526.15±1.58 a | 567.27±37.82 a | 436.40±31.63 a | 423.01±24.29 c |
表5 不同处理对水稻细胞分裂素和脱落酸含量的影响
Table 5 Effect of different treatments on cytokinins and abscisic acid concentrations of rice.
干旱处理 Drought stress | 细胞分裂素含量 Cytokinin content/(ng·g-1) | 脱落酸含量 Abscisic acid content/(ng·g-1) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
叶片 Leaf | 根系 Root | 叶片 Leaf | 根系 Root | ||||||||
NP | F06 | NP | F06 | NP | F06 | NP | F06 | ||||
CK | 180.32±24.50 a | 266.36±13.56 a | 31.34±2.12 a | 43.14±2.74 a | 423.56±65.56 c | 432.49±43.11 c | 448.34±32.16 a | 568.33±35.17 a | |||
LD | 159.02±19.63 b | 245.45±12.28 ab | 29.93±3.84 ab | 42.70±2.91 a | 438.05±22.49 c | 444.64±38.63 c | 440.99±22.98 a | 502.33±34.65 ab | |||
MD | 123.70±16.32 c | 153.92±18.58 b | 25.33±1.47 b | 36.06±3.09 b | 472.24±35.63 b | 498.86±51.26 b | 443.32±45.23 a | 491.03±26.54 b | |||
SD | 93.83±10.61 d | 118.35±16.07 c | 20.76±3.61 c | 29.15±1.58 c | 526.15±1.58 a | 567.27±37.82 a | 436.40±31.63 a | 423.01±24.29 c |
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