Combined influence of low temperature and drought on different varieties of rapeseed (Brassica napus L.)

Xu, Qing; Sami, Abdul; Hong, Zhang; Jin, Xue; Zheng, Wen Yin; Zhu, Zhe Yi; Wu, Longmei; Yu, Lei; Chen, Zhi Peng; Li, Yong; Yan, Yu; Zhang, Fu Gu; Zhou, Ke

doi:10.1016/j.sajb.2022.02.003

Cited by 11 publications

(7 citation statements)

References 31 publications

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“…Photosynthesis is the major driver for crop productivity and the reduction in the photosynthetic activities in drought stress conditions is due to the non-stomatal and stomatal restrictions. The non-stomatal restriction occurs during severe drought conditions, while the stomatal restriction majorly influences the de-crease in the photosynthetic performance particularly in mild drought conditions (Bogati & Walczak 2022) such that when the extent of drought is mild, the stomatal conductance reduces due to the decreased leaf water potential, and the environmental absorption rate of CO 2 drops, resulting in a reduced rate of photosynthesis in the leaves (Xu et al 2022). Summarily, as depicted in Figure 1, the biochemical and physiological response mechanism to drought stress results from a complex pathway of responses, beginning with the level of stress, which sets off a chain of molecular mechanisms and concluding at different levels of physiological, metabolic, molecular, and developmental responses (Sharma et al 2022).…”

Section: Reviewmentioning

confidence: 99%

Endophytic and rhizobacteria functionalities in alleviating drought stress in maize plants

Agunbiade¹,

Babalola²

2023

Plant Prot. Sci.

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Drought stress is among the significant forms of abiotic stresses that unfavourably affects maize survival as well as the development from germination to maturity. This paper, therefore, reviewed drought stress effects in maize plants and expatiated on the plausible adoptable mitigation measures to employ in curbing these effects as well. Water shortage prompts drought stress that alters the morphological, physiological and biochemical activities in maize plants.The major drought stress implications on the plant's survival are mostly in the area of altered metabolic functions, including nutrient metabolism, cell membrane integrity, water relationships, plant yield, photosynthetic processes, osmotic adjustment, and the pigment content. Mitigating strategies, such as the breeding of drought-tolerant varieties, genomic applications for drought tolerance enhancement in maize plants, as well as the use of rhizobacteria and endophytic bacteria, can be employed in alleviating drought stress and ensuring optimal maize productivity.

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Section: Reviewmentioning

confidence: 99%

Endophytic and rhizobacteria functionalities in alleviating drought stress in maize plants

Agunbiade¹,

Babalola²

2023

Plant Prot. Sci.

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“…The endogenous hormones GA, CTK, IAA, and ABA in rapeseed leaves were measured as described previously (Xu et al 2022).…”

Section: Assessment Of Antioxidant Enzyme Activitymentioning

confidence: 99%

“…Our previous studies showed genotype-dependent differences in chilling stress tolerance (Zhu et al 2021;Xu et al 2022). Additionally, the application of plant growth regulators, such as abscisic acid (Zhu et al 2021), brassinolide (Russinova et al 2017), and salicylic acid (Zhang et al 2021); osmoregulatory substances, such as soluble sugar (Fu et al 2020), betaine (Park et al 2006); and inorganic salt ions, such as Ca + and K + (Yang et al 2016) can also enhance chilling tolerance of plants.…”

Section: Introductionmentioning

confidence: 97%

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Exogenous application of 5-aminolevulinic acid Improves Chilling Tolerance in Rapeseed (Brassica napus L.) Seedlings

Zheng

Sun

et al. 2023

Preprint

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Rapeseed is an important oil crop in China. Low winter temperatures (LT) often limit plant growth and cause seed yield losses in rapeseed. Although exogenous application of 5-aminolevulinic acid (ALA) has been shown to enhance plant tolerance to various abiotic stressors, its physiological mechanisms for improving cold tolerance in rapeseed are not yet fully understood. In this study we investigated the physiological responses to exogenous ALA using the chilling-tolerant cultivar Zayou15 (ZY15) and the chilling-sensitive cultivar Huiyou 49 (HY49) under low-temperature stress. The results showed that low-[A1] temperature stress caused a considerable decrease the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), as well as in the contents of endogenous hormones GA, IAA, and CTK. These resulted in the accumulation of reactive oxygen species, with both the content of H2O2 and O2- showing considerable increases, as well as in membrane lipid peroxidation with considerable increases in both malondialdehyde content (MDA) and relative electrical conductivity (REC). Moreover, the contents of chlorophyll（Chl）b, Chl a/Chl b, transpiration rate (Tr), net photosynthesis (Pn), stomatal conductance (Gs), and intercellular CO2 concentration (Ci) were considerably decreased by low-temperature stress, resulting in remarkable growth inhibition (with the aboveground fresh weight significantly decreased). Although, 20 mgL-1 exogenous ALA significantly reduced O2-, H2O2, and MDA content, and REC in both cultivars; it did not increase POD, SOD, CAT, or ascorbic acid peroxidase (APX) under short-term low-temperature stress (12–48 h). However, ALA substantially increased the activities of GA, Pn, Tr, Gs and Ci, resulting in a considerable increase in aboveground fresh weight. Post-treatment spraying of rapeseed plants with 5 mL of 20 mg·L-1 ALA was more effective than pre-treatment spraying. Both cultivars sprayed with ALA post-treatment showed greater reduction in MDA content. The optimum ALA dosage and concentration were 5 mL and 20 mg·L-1, respectively, leading to considerable decrease in MDA, and REC content and increase in Chl content in leaves. In conclusion, our results demonstrate that exogenous application of ALA is an appropriate strategy for rapeseed to resist winter low-temperature stress.

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“…12 In this case, real-time and continuous monitoring of IAA was not realized since the sensors were disposable and the electrochemical data were treated manually. For a living plant, IAA concentration dynamically changes and responds with the external environmental factors such as temperature, 13 water, 14 nutrients, 15 and so on. Real-time online monitoring of IAA is necessary since it can reveal physiological regulation behavior in a specific time range and help to capture, record, and analyze the responses of the living plant to the environmental factors.…”

Section: ■ Introductionmentioning

confidence: 99%

Online Monitoring of Indole-3-acetic Acid in Living Plants Based on Nitrogen-Doped Carbon Nanotubes/Core–shell Au@Cu₂O Nanoparticles/Carbon Fiber Electrochemical Microsensor

Shi

et al. 2022

ACS Sustainable Chem. Eng.

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Electrochemical sensing is an effective method for trace determination of specific substances. However, there are many active substances in plants, and the pH environment of plant organs varies. These factors directly affect the performance of electrochemical sensors and make it difficult to realize real-time detection accurately. Here, an online intelligent monitoring system for indole-3-acetic acid (IAA) was proposed, including reusable microsensor, portable electrochemical workstation, and online cloud platform. The microsensor was fabricated by depositing nanocomposites of nitrogen-doped carbon nanotubes/core–shell Au@Cu2O nanoparticles on the carbon fiber microelectrode. The IAA microsensor has a wide concentration range of 1–10 000 ng/mL and an ultralow detection limit of 10.8–57.8 pg/mL at a pH range of 4–8. The influence of different pH values on IAA detection was investigated. It is also revealed that the IAA microsensor has good anti-interference ability, repeatability, and stability which are suitable for real-time detection of IAA in living plants. Artificial neural network (ANN) algorithm is employed to establish the relationship between electrochemical signal and IAA concentration, and the ANN model is then configured in the online monitoring system to intelligently obtain the IAA concentration. Based on this system, real-time and online monitoring of the IAA concentration in a living cabbage stem was realized for a long time of 12 h. This study provides a feasible solution based on electrochemical sensing to monitor online the living plant for precision agriculture.

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Combined influence of low temperature and drought on different varieties of rapeseed (Brassica napus L.)

Cited by 11 publications

References 31 publications

Endophytic and rhizobacteria functionalities in alleviating drought stress in maize plants

Endophytic and rhizobacteria functionalities in alleviating drought stress in maize plants

Exogenous application of 5-aminolevulinic acid Improves Chilling Tolerance in Rapeseed (Brassica napus L.) Seedlings

Online Monitoring of Indole-3-acetic Acid in Living Plants Based on Nitrogen-Doped Carbon Nanotubes/Core–shell Au@Cu₂O Nanoparticles/Carbon Fiber Electrochemical Microsensor

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Combined influence of low temperature and drought on different varieties of rapeseed (Brassica napus L.)

Cited by 11 publications

References 31 publications

Endophytic and rhizobacteria functionalities in alleviating drought stress in maize plants

Endophytic and rhizobacteria functionalities in alleviating drought stress in maize plants

Exogenous application of 5-aminolevulinic acid Improves Chilling Tolerance in Rapeseed (Brassica napus L.) Seedlings

Online Monitoring of Indole-3-acetic Acid in Living Plants Based on Nitrogen-Doped Carbon Nanotubes/Core–shell Au@Cu2O Nanoparticles/Carbon Fiber Electrochemical Microsensor

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Product

Resources

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Online Monitoring of Indole-3-acetic Acid in Living Plants Based on Nitrogen-Doped Carbon Nanotubes/Core–shell Au@Cu₂O Nanoparticles/Carbon Fiber Electrochemical Microsensor