当前位置: X-MOL 学术Iran. J. Sci. Technol. Trans. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Performance of Algae Extracts Priming for Enhancing Seed Germination Indices and Salt Tolerance in Calotropis procera (Aiton) W.T
Iranian Journal of Science and Technology, Transactions A: Science ( IF 1.7 ) Pub Date : 2021-01-30 , DOI: 10.1007/s40995-021-01071-x
Mohammad Bahmani Jafarlou , Babak Pilehvar , Mohammad Modarresi , Mehdi Mohammadi

Salt stress is considered as the most critical environmental factor which negatively affects the germination, growth and establishment of trees and shrubs. Marine algae extract represents an important option of biostimulants which can improve the crop tolerance to abiotic stresses, such as salinity. In the present study, we investigated the potential of seaweed and microalga extracts as biostimulants priming agent to attenuate the effect of salt stress on seed germination and growth indices of milkweed (Calotropis procera Ait), which was grown under different salinity concentrations. Milkweed seeds were primed by the seaweed extract (SWE) of Sargassum angustifolium, and microalga extract (MAE) of Spirulina platensis at various concentrations (0, 5, 10 and 15 ml l−1) and then exposed to salt stress at four levels (0, 7.5, 15 and 30 dS m−1 of diluted seawater) in factorial experiment and completely randomized design. The results indicated that seeds primed by biostimulant germinate and also tolerate salinity up to 15 dS m−1. Although SWEs (10 ml l−1) increased germination percentage by 42% in seeds exposed to 7.5 dS m−1, the parameter was significantly enhanced using MAEs (5 ml l−1) by 60, 65 and 60% at 7.5–30 dS m−1, respectively. Also, SWE (< 10 ml l−1) improved seed vigor index by 55% and 86.6% as exposed to 0, 7.5 dS m−1, whereas MAE (5 ml l−1) increased it by 54%, 66% and 9% at 0, 7.5 and 15dS m−1, respectively. Moreover, root and shoot length as well as root–shoot ratio was markedly increased using 10 ml of both algae under salinity lower 15dS m−1 than control. SWEs and MAEs enhanced shoot weight by 30.74% and 41.6% in salinity-free control group, respectively. Both priming (< 10 ml) resulted in the raising of root dry weight in stressed-plants versus the control. The highest salt tolerance index in stressed-milkweed was found 85% at 15 dS m−1 while algae priming (< 10 ml l−1) raised it by 118% at the same salinity than control. Totally, this study demonstrates the potential of algae priming (at lower concentrations) for increasing milkweed tolerance to salinity stress and highlights the possibility of using it as biostimulant under harsh environmental conditions.



中文翻译:

藻提取物启动处理可增强拟南芥(Aiton)WT的种子萌发指数和耐盐性

盐胁迫被认为是最严重的环境因素,会对树木和灌木的发芽,生长和生长产生负面影响。海藻提取物是生物刺激剂的重要选择,可以提高农作物对非生物胁迫(如盐度)的耐受性。在本研究中,我们研究了海藻和微藻提取物作为生物刺激剂的潜力,以减轻盐胁迫对在不同盐度下生长的乳草(Calotropis procera Ait)的种子萌发和生长指数的影响。乳草种子由Sargassum angustifolium的海藻提取物(SWE)和钝顶螺旋藻的微藻提取物(MAE)引发。在析因实验和完全随机设计中,以四个浓度(0、7.5、15和30 dS m -1的稀释海水)暴露于各种浓度(0、5、10和15 ml l -1)下,然后暴露于盐胁迫下。结果表明,由生物刺激剂引发的种子发芽并且还耐受高达15 dS m -1的盐度。尽管在暴露于7.5 dS m -1的种子中,SWE(10 ml l -1)使发芽率提高了42%,但使用MAE(5 ml l -1)在7.5–30时,该参数显着提高了60%,65%和60% dS m -1。此外,SWE(<10 ml l -1)暴露于0、7.5 dS m -1时,种子活力指数分别提高了55%和86.6%。,而MAE(5 ml l -1)在0、7.5和15dS m -1时分别增加了54%,66%和9%。此外,在盐度低于对照的15dS m -1下使用10 ml的两种藻类,根和茎长以及根与茎的比率均显着增加。在无盐度的对照组中,SWE和MAE分别使苗重增加30.74%和41.6%。与对照相比,两种引发(<10 ml)均导致胁迫植物的根干重增加。在15 dS m -1时发现了应激乳草的最高耐盐性指数为85%,而藻类引发(<10 ml l -1)在与对照相同的盐度下将其提高了118%。总的来说,这项研究证明了藻类引发(在较低浓度下)增强乳草对盐分胁迫的耐受性的潜力,并强调了在恶劣的环境条件下将其用作生物刺激剂的可能性。

更新日期:2021-03-16
down
wechat
bug