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作物学报 ›› 2025, Vol. 51 ›› Issue (3): 823-834.doi: 10.3724/SP.J.1006.2025.44115

• 研究简报 • 上一篇    下一篇

6-BA调控增强苎麻抗旱性的生理机制研究

管圣(), 廖澳, 王立琦, 李茜, 卢建宁, 荣晶, 崔国贤, 杨瑞芳, 佘玮()   

  1. 湖南农业大学农学院, 湖南长沙 410128
  • 收稿日期:2024-07-18 接受日期:2024-11-01 出版日期:2025-03-12 网络出版日期:2024-11-18
  • 通讯作者: *佘玮, E-mail: clregina@163.com
  • 作者简介:E-mail: 2687065996@qq.com
  • 基金资助:
    财政部和农业农村部国家现代农业产业技术体系建设专项(麻类)(CARS-16-E11);国家重点研发计划项目(2018YFD0201106);国家自然科学基金项目(31471543)

Physiological mechanisms of 6-BA regulation to enhance drought tolerance in ramie

GUAN Sheng(), LIAO Ao, WANG Li-Qi, LI Qian, LU Jian-Ning, RONG Jing, CUI Guo-Xian, YANG Rui-Fang, SHE Wei()   

  1. College of Agriculture, Hunan Agricultural University, Changsha 410128, Hunan, China
  • Received:2024-07-18 Accepted:2024-11-01 Published:2025-03-12 Published online:2024-11-18
  • Contact: *E-mail: clregina@163.com
  • Supported by:
    China Agriculture Research System of MOF and MARA(Hemp)(CARS-16-E11);National Key Research and Development Program of China(2018YFD0201106);National Natural Science Foundation of China(31471543)

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摘要：

本试验以湘苎7号作为材料, 探究6-苄氨基腺嘌呤(6-benzyladenine, 6-BA)调控增强苎麻抗旱性的生理机制, 结果表明, 不同浓度6-BA处理苎麻叶片脯氨酸(PRO)含量、可溶性糖(SS)和可溶性蛋白(SP)含量的积累量随着处理天数的增加整体呈现不断上升的趋势, 株高、茎粗、叶面积、生物量、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性、抗坏血酸过氧化物酶(APX)活性均表现出先升高后下降的趋势, 多以干旱胁迫24 d最高, 而丙二醛(MDA)含量、叶片相对电导率与W0相比逐渐降低, 相对含水量呈持续下降。通过对苎麻叶片各项生理生化指标进行综合分析得出, 不同浓度6-BA处理抗旱性综合排序为W2 (100 mg L-1) > W3 (150 mg L-1) > W1 (50 mg L-1) > W4 (mg L-1), 说明100 mg L-1 6-BA处理下干旱胁迫后苎麻的缓解效应最好。

关键词: 6-BA, 苎麻, 生理特性, 干旱

Abstract:

In this experiment, Xiang Ramie 7 was used to investigate the physiological mechanisms by which 6-Benzyladenine (6-BA) enhances drought tolerance in ramie. The results indicated that the accumulation of proline (PRO), soluble sugar (SS), and soluble protein (SP) in ramie leaves increased with the duration of treatment across different concentrations of 6-BA. The activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX) exhibited an initial rise followed by a decline, peaking at 24 days of drought stress. In contrast, malondialdehyde (MDA) content and leaf relative conductivity gradually decreased compared to W0, while relative water content continuously declined. A comprehensive analysis of the physiological and biochemical indices revealed that the drought tolerance of ramie treated with different concentrations of 6-BA followed the order: W2 (100 mg L-1) > W3 (150 mg L-1) > W1 (50 mg L-1) > W4 (200 mg L-1). Therefore, it was concluded that the optimal mitigation effect under drought stress was achieved with 100 mg L-1 of 6-BA treatment.

Key words: 6-BA, ramie, physiological characteristics, drought

表1

干旱胁迫下不同浓度6-BA处理对湘苎7号株高的影响"

处理
Treatment		 株高Plant height (cm)
12 d 24 d 36 d
CK 78.06±1.14 a 84.30±1.09 a 91.30±2.04 a
W0 62.60±1.14 c 64.32±1.00 d 66.14±1.14 d
W1 65.01±1.17 b 67.13±1.25 c 74.48±1.91 c
W2 67.14±1.28 b 71.34±1.37 b 77.56±1.89 b
W3 66.08±1.35 bc 68.73±1.14 c 75.44±1.18 bc
W4 64.61±1.08 b 68.26±1.24 c 73.80±1.68 c

表2

干旱胁迫下不同浓度6-BA处理对湘苎7号茎粗的影响"

处理
Treatment		 茎粗Stem diameter (mm)
12 d 24 d 36 d
CK 7.96±0.26 a 8.60±0.23 a 9.06±0.15a
W0 7.33±0.24 b 7.44±0.05 c 7.52±0.08 d
W1 7.48±0.14 b 7.67±0.08 bc 7.78±0.28 cd
W2 7.54±0.11 b 7.81±0.18 b 8.18±0.13 b
W3 7.50±0.07 b 7.76±0.18 b 7.90±0.24 bc
W4 7.47±0.14 b 7.52±0.35 bc 7.84±0.33 b

表3

干旱胁迫下不同浓度6-BA处理对湘苎7号叶面积的影响"

处理
Treatment		 叶面积Leaf area (cm2)
12 d 24 d 36 d
CK 110.24±6.59 a 133.32±8.00 a 157.69±11.72 a
W0 89.72±3.40 d 105.29±4.13 d 116.94±4.57 d
W1 97.78±4.71 bc 113.58±5.14 c 130.09±4.13 c
W2 101.69±5.75 b 123.45±3.61 b 142.21±4.83 b
W3 95.78±4.16 bc 116.41±3.64 c 133.76±5.07 c
W4 92.78±3.01 cd 114.82±3.49 c 129.92±4.53 c

表4

干旱胁迫下不同浓度6-BA处理对湘苎7号生物量的影响"

处理
Treatment		 地上鲜重
Aboveground fresh weight		 地下鲜重
Underground fresh weight		 地上干重
Aboveground dry weight		 地下干重
Underground dry weight
CK 97.10±3.75 a 62.68±2.32 a 30.33±1.70 a 17.59±1.25 a
W0 68.79±1.92 d 40.30±4.51 c 18.04±1.77 d 12.75±0.45 c
W1 73.90±1.79 bcd 46.03±1.60 b 22.30±1.31 c 14.38±1.64 bc
W2 78.77±2.32 b 47.86±2.39 b 25.77±1.24 b 16.02±1.67 ab
W3 77.01±2.94 bc 46.71±2.01 b 23.49±0.54 bc 14.60±0.53 bc
W4 71.93±3.37 cd 42.92±3.58 c 21.56±1.69 c 13.64±1.00 c

图1

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片丙二醛含量的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图2

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片相对电导率的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图3

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片相对含水量的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图4

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片可溶性糖含量的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图5

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片可溶性蛋白含量的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图6

干旱胁迫不同浓度6-BA处理对湘苎7号叶片脯氨酸含量的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图7

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片SOD活性的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图8

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片POD活性的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图9

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片CAT活性的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

图10

干旱胁迫下不同浓度6-BA处理对湘苎7号叶片APX活性的影响 同一时期的不同小写字母表示在0.05水平下具有显著性差异。处理同表1。"

表5

方差贡献率载荷矩阵"

指标
Index		 特征值
Eiges values		 方差贡献率
Proportion of variance (%)		 累计方差贡献率
Cumulative variance (%)
PC1 6.198 61.997 61.997
PC2 2.398 23.982 85.959

表6

主成分分析后的旋转载荷矩阵"

指标
Index		 第一主成分
First principal component		 第二主成分
Second principal component
丙二醛Malondialdehyde -0.128 0.939
相对电导率Leaf relative water content 0.043 0.936
相对含水量Leaf relative conductivity -0.204 0.860
可溶性糖Soluble sugar 0.691 -0.516
可溶性蛋白Soluble protein 0.770 -0.505
脯氨酸Proline 0.692 -0.588
超氧化物歧化酶Superoxide dismutase 0.950 -0.056
过氧化物酶Peroxidase 0.952 -0.152
过氧化氢酶Catalase 0.916 -0.006
抗坏血酸过氧化物酶Ascorbate peroxidase 0.972 -0.062

表7

综合得分排名"

处理
Index		 F1 F2 综合得分
Composite score		 综合得分排名
Composite score ranking
CK 0.489 2.034 0.920 6
W0 2.060 0.149 1.527 5
W1 3.398 0.261 2.523 3
W2 4.187 0.317 3.108 1
W3 3.485 0.534 2.661 2
W4 2.933 0.178 2.164 4
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