中国农业科技导报 ›› 2023, Vol. 25 ›› Issue (9): 23-33.DOI: 10.13304/j.nykjdb.2022.0172
收稿日期:
2022-03-07
接受日期:
2022-05-06
出版日期:
2023-09-15
发布日期:
2023-09-28
作者简介:
单莉莉 E-mail:sdszfm@163.com
基金资助:
Received:
2022-03-07
Accepted:
2022-05-06
Online:
2023-09-15
Published:
2023-09-28
摘要:
为探明孕穗期低温胁迫对不同品种水稻叶片生理特性和结实率的影响差异及外源褪黑素(melatonin,MT)对低温胁迫的缓解效应,以2个耐冷性不同的水稻品种龙粳11(LJ11,冷敏型)和龙稻5(LD5,耐冷型)为材料进行盆栽试验,于孕穗期分别进行低温(16 ℃)以及喷施100 μmol·L-1的MT处理,以室外温度、喷施清水为对照,探讨低温和外源MT对水稻叶片膜质过氧化、渗透调节、抗氧化酶活性等生理指标和结实率的影响。结果表明,低温胁迫下,耐冷型品种龙稻5的结实率变化较小,冷敏型品种龙粳11的结实率显著降低了5.96%~45.26%;龙稻5和龙粳11叶片中丙二醛(malondialdehyde,MDA)和过氧化氢(hydrogen peroxide, H2O2)含量均显著提高,超氧化物歧化酶(superoxide dismutase,SOD)、过氧化物酶(peroxidase,POD)活性均显著提高。同时低温胁迫也导致渗透调节物质含量增加,龙稻5和龙粳11叶片中可溶性蛋白、可溶性糖和脯氨酸含量均显著提高。叶面喷施外源MT能够有效缓解低温对水稻的伤害,对冷敏品种效果更为明显,可显著降低龙粳11叶片内MDA和H2O2含量;显著提高SOD和POD活性;可溶性糖、可溶性蛋白和脯氨酸含量也显著增加。叶面喷施外源MT也可减轻低温对结实率的影响,龙粳11结实率极显著提高了3.13%~16.64%。综上,低温胁迫下MT能够诱导水稻叶片内抗氧化酶活性提高、渗透调节物质显著增加,有效地清除活性氧,进而提高了水稻的抗寒性。
中图分类号:
单莉莉. 孕穗期低温对水稻叶片生理、产量的影响及外源褪黑素缓解效应[J]. 中国农业科技导报, 2023, 25(9): 23-33.
Lili SHAN. Effects of Low Temperature During Booting Stage on Rice Physiology and Alleviating Effect of Exogenous Melatonin[J]. Journal of Agricultural Science and Technology, 2023, 25(9): 23-33.
处理 Treatment | 药剂 Pesticide | 温度 Temperature |
---|---|---|
T1 | 喷施MT Spray MT | 恒定16 ℃ Constant 16 ℃ |
T2 | 喷施清水 Spray water | 恒定16 ℃ Constant 16 ℃ |
CK | 喷施清水 Spray water | 常温 Normal temperature |
表1 试验设计
Table 1 Test design scheme
处理 Treatment | 药剂 Pesticide | 温度 Temperature |
---|---|---|
T1 | 喷施MT Spray MT | 恒定16 ℃ Constant 16 ℃ |
T2 | 喷施清水 Spray water | 恒定16 ℃ Constant 16 ℃ |
CK | 喷施清水 Spray water | 常温 Normal temperature |
材料 Material | 处理Treatment | 处理天数 Days after treating/d | ||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
龙稻5 LD5 | T1 | 99.24±0.04 Aa | 99.25±0.04 Aa | 99.27±0.06 Aa | 99.22±0.11 Aa | 99.24±0.07 Aa |
T2 | 99.34±0.05 Aa | 99.31±0.04 Aa | 99.22±0.05 Aa | 99.22±0.11 Aa | 99.21±0.07 Aa | |
CK | 99.41±0.03 Aa | 99.41±0.03 Aa | 99.41±0.03 Aa | 99.41±0.05 Aa | 99.41±0.01 Aa | |
龙粳11 LJ11 | T1 | 62.95±0.08 Bb | 60.89±0.08 Bb | 56.71±0.41 Bb | 51.44±0.64 Bb | 38.74±0.45 Bb |
T2 | 61.04±0.09 Cc | 56.48±0.07 Cc | 50.76±0.48 Cc | 44.10±0.36 Cc | 35.53±0.35 Cc | |
CK | 64.91±0.15 Aa | 64.91±0.07 Aa | 64.91±0.26 Aa | 64.91±0.35 Aa | 64.91±0.21 Aa |
表2 不同处理下水稻的结实率 (%)
Table 2 Seed-setting of rice under different treatments
材料 Material | 处理Treatment | 处理天数 Days after treating/d | ||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
龙稻5 LD5 | T1 | 99.24±0.04 Aa | 99.25±0.04 Aa | 99.27±0.06 Aa | 99.22±0.11 Aa | 99.24±0.07 Aa |
T2 | 99.34±0.05 Aa | 99.31±0.04 Aa | 99.22±0.05 Aa | 99.22±0.11 Aa | 99.21±0.07 Aa | |
CK | 99.41±0.03 Aa | 99.41±0.03 Aa | 99.41±0.03 Aa | 99.41±0.05 Aa | 99.41±0.01 Aa | |
龙粳11 LJ11 | T1 | 62.95±0.08 Bb | 60.89±0.08 Bb | 56.71±0.41 Bb | 51.44±0.64 Bb | 38.74±0.45 Bb |
T2 | 61.04±0.09 Cc | 56.48±0.07 Cc | 50.76±0.48 Cc | 44.10±0.36 Cc | 35.53±0.35 Cc | |
CK | 64.91±0.15 Aa | 64.91±0.07 Aa | 64.91±0.26 Aa | 64.91±0.35 Aa | 64.91±0.21 Aa |
图1 不同处理下水稻叶片的丙二醛含量注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 1 MDA content in leaves of rice under different treatmentsNote: Different capital and lowercase letters indicate significant differences between different treatments in same variety at P<0.01 and P<0.05 levels, respectively.
图2 不同处理下水稻叶片的过氧化氢含量注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 2 H2O2 content in leaves of rice under different treatmentsNote: Different capital and lowercase letters indicate significant differences between differnet treatments in same variety at P<0.01 and P<0.05 levels, respectively.
图3 不同处理下水稻叶片的超氧化物歧化酶活性注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 3 SOD activity in leaves of rice under different treatmentsNote: Different capital and lowercase letters indicate significant differences between different treatments in same variety at P<0.01 and P<0.05 levels, respectively.
图4 不同处理下水稻叶片的过氧化物酶活性注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 4 POD activity in leaves of rice under different treatmentsNote: Different capital and lowercase letters indicate significant differences between differnet treatments in same variety column at P<0.01 and P<0.05 levels, respectively.
材料 Material | 处理 Treatment | 处理天数Days after treating/d | ||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
龙稻5 LD5 | T1 | 25.01±0.26 Bc | 20.96±0.12 Cc | 18.62±0.13 Bc | 15.94±0.13 Cc | 20.49±0.12 Cc |
T2 | 28.74±0.40 Ab | 22.54±0.06 Bb | 19.56±0.06 Bb | 17.19±0.09 Bb | 22.68±0.06 Bb | |
CK | 30.35±0.15 Aa | 30.04±0.06 Aa | 30.68±0.18 Aa | 30.24±0.19 Aa | 31.03±0.17 Aa | |
龙粳11 LJ11 | T1 | 32.06±0.14 Cc | 24.25±0.18 Bc | 20.28±0.04 Bc | 17.92±0.18 Bb | 25.09±0.21 Bb |
T2 | 33.52±0.17 Bb | 25.13±0.07 Bb | 20.95±0.12 Bb | 18.60±0.10 Bb | 25.73±0.33 Bb | |
CK | 36.18±0.05 Aa | 35.83±0.24 Aa | 35.26±0.16 Aa | 35.46±0.28 Aa | 35.72±0.50 Aa |
表3 不同处理下水稻叶片的SOD/POD比值
Table 3 SOD/POD ratio in leaves of rice under different treatments
材料 Material | 处理 Treatment | 处理天数Days after treating/d | ||||
---|---|---|---|---|---|---|
1 | 2 | 3 | 4 | 5 | ||
龙稻5 LD5 | T1 | 25.01±0.26 Bc | 20.96±0.12 Cc | 18.62±0.13 Bc | 15.94±0.13 Cc | 20.49±0.12 Cc |
T2 | 28.74±0.40 Ab | 22.54±0.06 Bb | 19.56±0.06 Bb | 17.19±0.09 Bb | 22.68±0.06 Bb | |
CK | 30.35±0.15 Aa | 30.04±0.06 Aa | 30.68±0.18 Aa | 30.24±0.19 Aa | 31.03±0.17 Aa | |
龙粳11 LJ11 | T1 | 32.06±0.14 Cc | 24.25±0.18 Bc | 20.28±0.04 Bc | 17.92±0.18 Bb | 25.09±0.21 Bb |
T2 | 33.52±0.17 Bb | 25.13±0.07 Bb | 20.95±0.12 Bb | 18.60±0.10 Bb | 25.73±0.33 Bb | |
CK | 36.18±0.05 Aa | 35.83±0.24 Aa | 35.26±0.16 Aa | 35.46±0.28 Aa | 35.72±0.50 Aa |
图5 不同处理下水稻叶片的可溶性蛋白的含量注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 5 Soluble protein content in leaves of rice under different treatmentsNote: Different capital and lowercase letters indicate significant differences between different treatments in same variety at P<0.01 and P<0.05 levels, respectively.
图6 不同处理下水稻叶片的可溶性糖的含量注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 6 Soluble sugar content in leaves of rice under different treatmentsNote: Different capital and lowercase letters indicate significant differences between different treatments in same variety at P<0.01 and P<0.05 levels, respectively.
图7 不同处理下水稻叶片的脯氨酸的含量注:不同大、小写字母分别表示同一品种不同处理间在P<0.01和P<0.05水平差异显著。
Fig. 7 Proline content in leaves of rice under different treatmentsNote:Different capital and lowercase letters indicate significant differences between differnet treatments in same variety at P<0.01 and P<0.05 levels, respectively.
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