Institute of Botany, University of the Punjab, Lahore, Pakistan.
RO-II Department, SSG, University of the Punjab, Lahore, Pakistan.
Int J Phytoremediation. 2022;24(9):955-962. doi: 10.1080/15226514.2021.1985961. Epub 2021 Oct 10.
Abiotic stress reduces the plant growth and biomass production. Putrescine (Put) may be applied to alleviate numerous types of abiotic stresses in plants. The present research was intended to evaluate the role of exogenously applied Put in extenuation of cadmium (Cd) stress in coriander plants. Coriander seeds primed with 0.25, 0.5, and1 mM Put were allowed to grow in 50 mg kg Cd contaminated soil for one month. Put treatment improved seed germination, gas exchange attributes, root growth and shoot growth of coriander. The improved activity of stress-responsive enzymes such as superoxide dismutase, catalase and peroxidase, besides amplification of proline was observed in Put treated seedlings under Cd stress. In addition, a reduced amount of total soluble protein and sugars content were noticed in Cd stressed seedlings. Nevertheless, Put reduced MDA level in treated plants. Our results demonstrated that Put mitigated Cd induced stress by modulating antioxidants and photosynthetic activity of coriander plants. Most of the researchers have studied the role of endogenous putrescine in alleviation of plant stress. However, during current study, we primed coriander seeds with putrescine. Our results elucidated very promising role of exogenously applied putrescine in stress mitigation and growth improvement of coriander seedlings under Cd stress. The findings of current study advocate the application of putrescine for stress alleviation in crop plants.
非生物胁迫会降低植物的生长和生物量产量。腐胺（Put）可用于缓解植物的多种非生物胁迫。本研究旨在评估外源 Put 在减轻芫荽植物镉（Cd）胁迫中的作用。用 0.25、0.5 和 1mM Put 预培养芫荽种子，然后让它们在 50mgkg Cd 污染的土壤中生长一个月。Put 处理可提高种子萌发、气体交换特性、根生长和芫荽地上部分的生长。在 Cd 胁迫下，Put 处理的幼苗中观察到应激响应酶（如超氧化物歧化酶、过氧化氢酶和过氧化物酶）的活性提高，脯氨酸含量增加。此外，在 Cd 胁迫的幼苗中还观察到总可溶性蛋白和糖含量减少。然而，Put 降低了处理植物中的 MDA 水平。我们的结果表明，Put 通过调节抗氧化剂和光合活性来减轻 Cd 诱导的胁迫。大多数研究人员已经研究了内源性腐胺在缓解植物胁迫中的作用。然而，在当前的研究中，我们用腐胺对芫荽种子进行了预处理。我们的结果阐明了外源腐胺在 Cd 胁迫下缓解芫荽幼苗胁迫和促进生长的非常有前景的作用。本研究的结果支持在作物植物中应用腐胺来缓解胁迫。
