LIU Sha-sha,BAI Xin-fu,FENG Chun-xiao,et al.Effects of Soil Salinity on the Growth and Photosynthesis of Soybean under Drought Conditions[J].Soybean Science,2017,36(06):921-926.[doi:10.11861/j.issn.1000-9841.2017.06.0921]
干旱条件下土壤盐分对大豆生长及光合作用的影响
- Title:
- Effects of Soil Salinity on the Growth and Photosynthesis of Soybean under Drought Conditions
- 文献标志码:
- A
- 摘要:
- 以盆栽大豆为材料,设置不同程度的土壤盐分(NaCl)、干旱及旱盐组合处理,然后测定各处理大豆植株的株高、生物量、光合作用指标以及植株的水分状况和Na+、K+含量,探索干旱条件下土壤盐分对大豆生长的影响及可能机制。结果表明:干旱和盐胁迫均可导致大豆叶片的净光合速率降低和生长量的减少,干旱还导致光合机构的严重损伤。但是,干旱和适量土壤盐分(100~150 mmol·L-1NaCl)组合处理的大豆植株,其生长量、净光合速率和PSⅡ最大光化学效率都显著高于单一干旱处理。同时,旱盐组合处理的大豆叶片RWC、Na+含量也高于单一干旱处理,水势和渗透势低于后者,且叶片Na+含量与其渗透势降低显著相关。综合分析表明,在干旱条件下,土壤适量NaCl的存在使大豆能够吸收和积累更多Na+等盐离子作为渗透调节物质,来降低渗透势、提高吸水能力,以改善植株的水分状况和光合性能,保持植株较高的生长速率,即土壤中适量盐分(NaCl)的存在可减轻干旱对大豆的负效应。
- Abstract:
- The impact of soil salinity on the growth of soybean plants and the possible mechanisms in association with the impact was investigated. The investigation involved the measurement of effects of combined drought and salinity stresses on the soybean seedlings. The growth and photosynthetic rate, chlorophyll fluorescence parameters, water status and the K+and Na+content in the stressed soybean seedlings.The results showed that, under drought or salt stress, the growth of the seedlings was significantly inhibited, leaf net photosynthesis reduced, resulting in serious injury in the photosynthetic apparatus.However, the parameters like the net photosynthetic rate, maximum quantum efficiency of PhotosystemⅡ and biomass were significantly higher in seedlings subjected to combined stresses of drought and moderate soil salinity than to single drought stress. In addition, the relative water and content and Na+content was also significantly higher, but the water and osmotic potentials of the plants subjected to combined stresses of drought and moderate soil salinity than to single drought stress, with the decline of the tissue osmotic potential being closely correlated to the Na+content.This may suggest that under drought conditions, moderate salt stress in the soil could force the soybean seedlings to absorb and accumulate more Na+ions as osmolytes, so that the tissue osmotic potential being reduced and suction force for water absorption in plants being enhanced, which was conducive to soybean plants maintain higher water content, maintain a relatively higher rate of photosynthesis and growth.In other words, the presence of moderate NaCl in soil might effectively mitigate the negative effects of drought on the growth of soybean.
参考文献/References:
[1]Aroca R , Porcel R,Ruiz-Lozano J M.Regulation of root water uptake under abiotic stress conditions[J].Journal of Experimental Botany,2012,63(1): 43-57.
相似文献/References:
[1]闫春娟,王文斌,涂晓杰,等.不同生育时期干旱胁迫对大豆根系特性及产量的影响[J].大豆科学,2013,32(01):59.[doi:10.3969/j.issn.1000-9841.2013.01.014]
YAN Chun-juan,WANG Wen-bin,TU Xiao-jie,et al.Effect of Drought Stress at Different Growth Stage on Yield and Root Characteristics of Soybean[J].Soybean Science,2013,32(06):59.[doi:10.3969/j.issn.1000-9841.2013.01.014]
[2]梁 鹏,邢兴华,周 琴,等.α-萘乙酸对干旱和复水处理下大豆幼苗生长和光合作用的影响[J].大豆科学,2011,30(01):50.[doi:10.11861/j.issn.1000-9841.2011.01.0050]
LIANG Peng,XING Xing-hua,ZHOU Qin,et al.Effect of NAA on Growth and Photosynthetic Characteristic of Soybean Seedling under Drought and Re-watering[J].Soybean Science,2011,30(06):50.[doi:10.11861/j.issn.1000-9841.2011.01.0050]
[3]刘颖,张明怡,韩光,等.干旱胁迫下钾对大豆叶片保护酶活性及产量的影响[J].大豆科学,2011,30(02):341.[doi:10.11861/j.issn.1000-9841.2011.02.0341]
LIU Ying,ZHANG Ming-yi,HAN Guang,et al.Effect of Potassium on Soybean Leaf Protective Enzymes and Yield under Drought Stress[J].Soybean Science,2011,30(06):341.[doi:10.11861/j.issn.1000-9841.2011.02.0341]
[4]钟鹏,吴俊江,刘丽君,等.干旱胁迫对不同磷效率基因型大豆膜脂过氧化作用的影响[J].大豆科学,2008,27(04):610.[doi:10.11861/j.issn.1000-9841.2008.04.0610]
ZHONG-Peng,WU Jun-jiang,LIU Li-jun,et al.Effect of Drought Stress on Lipid Peroxidation in Soybean Varieties with Different P Efficiency[J].Soybean Science,2008,27(06):610.[doi:10.11861/j.issn.1000-9841.2008.04.0610]
[5]王伟,姜伟,张金龙,等.大豆种质的耐旱性鉴定及耐旱指标筛选[J].大豆科学,2015,34(05):808.[doi:10.11861/j.issn.1000-9841.2015.05.0808]
WANG Wei,JIANG Wei,ZHANG Jin-long,et al.Selection of Drought-tolerant Soybean and Evaluation of the Drought.tolerance Indices[J].Soybean Science,2015,34(06):808.[doi:10.11861/j.issn.1000-9841.2015.05.0808]
[6]魏崃,吴广锡,唐晓飞,等.过表达GmHSFA1大豆在干旱条件下对高温的响应[J].大豆科学,2016,35(02):257.[doi:10.11861/j.issn.1000-9841.2016.02.0257]
WEI Lai,WU Guang-xi,TANG Xiao-fei,et al.Soybean Responses to High Temperatures Under Drought Stress in the Presence of An Over-expressed GmHSFA1 Gene[J].Soybean Science,2016,35(06):257.[doi:10.11861/j.issn.1000-9841.2016.02.0257]
[7]高鑫宇,刘丽君,刘博,等.PEG 模拟干旱对大豆抗氧化酶活性及抗氧化能力的影响[J].大豆科学,2016,35(04):616.[doi:10.11861/j.issn.1000-9841.2016.04.0616]
GAO Xin-yu,LIU Li-jun,LIU Bo,et al.Effect of Drought Stress Simulated by PEG on Antioxidant Enzyme Activitiesand Antioxidant Capacity in Soybean[J].Soybean Science,2016,35(06):616.[doi:10.11861/j.issn.1000-9841.2016.04.0616]
[8]金毅,郑浩宇,金喜军,等.外源ABA、SA及JA对干旱胁迫及复水下大豆生长的影响[J].大豆科学,2016,35(06):958.[doi:10.11861/j.issn.1000-9841.2016.06.0958]
JIN Yi,ZHENG Hao-yu,JIN Xi-jun,et al.Effect of ABA,SA and JA on Soybean Growth Under Drought Stress and Re-watering[J].Soybean Science,2016,35(06):958.[doi:10.11861/j.issn.1000-9841.2016.06.0958]
[9]刘丽君,尹田夫,孟良.大豆原生质膜及混合细胞器膜脂脂肪酸对干旱胁迫的反应[J].大豆科学,1991,10(01):46.[doi:10.11861/j.issn.1000-9841.1991.01.0046]
[J].Soybean Science,1991,10(06):46.[doi:10.11861/j.issn.1000-9841.1991.01.0046]
[10]谢甫绨,董钻,赵艺新.大豆器官间的热能分布与耐旱性的关系初报[J].大豆科学,1993,12(02):107.[doi:10.11861/j.issn.1000-9841.1993.02.0107]
[J].Soybean Science,1993,12(06):107.[doi:10.11861/j.issn.1000-9841.1993.02.0107]
备注/Memo
基金项目:国家自然科学青年基金(31601994)。