Molecular Interventions to Ameliorate Environmental Stresses in Orchids

Sembi, Jaspreet K.; Ghai, Devina; Verma, Jagdeep

doi:10.1007/978-981-15-0690-1_20

Cited by 5 publications

(3 citation statements)

References 119 publications

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“…Exposure to UV-B radiation generates reactive oxygen species, which affect DNA and damage protein. In response, plants synthesize phenolic compounds to protect their tissue and regulate the antioxidant mechanisms at the cellular and whole-organism levels [43][44][45]. In Poland, where our study was conducted, UV radiation is the lowest from November to March (autumn, winter).…”

Section: Discussionmentioning

confidence: 99%

Seasonality Affects Low-Molecular-Weight Organic Acids and Phenolic Compounds’ Composition in Scots Pine Litterfall

Ilek,

Gąsecka,

Magdziak

et al. 2024

Plants

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Background and Aims: Secondary plant metabolites, including organic acids and phenolic compounds, have a significant impact on the properties of organic matter in soil, influencing its structure and function. How the production of these compounds in foliage that falls to the forest floor as litterfall varies across tree age and seasonality are of considerable interest for advancing our understanding of organic matter dynamics. Methods: Monthly, we collected fallen needles of Scots pine (Pinus sylvestris L.) across stands of five different age classes (20, 40, 60, 80, and 100 years) for one year and measured the organic acids and phenolic compounds. Results: Seven low-molecular-weight organic acids and thirteen phenolic compounds were detected in the litterfall. No differences were observed across stand age. Significant seasonal differences were detected. Most compounds peaked during litterfall in the growing season. Succinic acid was the most prevalent organic acid in the litterfall, comprising 78% of total organic acids (351.27 ± 34.27 µg g− 1), and was 1.5 to 11.0 times greater in the summer than all other seasons. Sinapic acid was the most prevalent phenolic compound in the litterfall (42.15 µg g− 1), representing 11% of the total phenolic compounds, and was 39.8 times greater in spring and summer compared to autumn and winter. Growing season peaks in needle concentrations were observed for all thirteen phenolic compounds and two organic acids (lactic, succinic). Citric acid exhibited a definitive peak in late winter into early spring. Conclusions: Our results highlight the seasonal dynamics of the composition of secondary plant metabolites in litterfall, which is most different at the onset of the growing season. Fresh inputs of litterfall at this time of emerging biological activity likely have seasonal impacts on soil’s organic matter composition as well.

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Section: Discussionmentioning

confidence: 99%

Seasonality Affects Low-Molecular-Weight Organic Acids and Phenolic Compounds’ Composition in Scots Pine Litterfall

Ilek,

Gąsecka,

Magdziak

et al. 2024

Plants

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“…Nevertheless, the POD, SO, and GST expression changes in T48 and T96 (Fig. 5; Supplementary Table 2) indicate that similar to Catharanthus roseus [49] and other orchids [50], C. ensifolium activates specific genes to ameliorate salt stress (Fig. 7).…”

Section: Ensifolium Leaves Exhibit Expression Changes In Salt Stress ...mentioning

confidence: 99%

Transcriptome analysis reveals the key pathways and candidate genes involved in salt stress responses in Cymbidium ensifolium leaves

Liu

Sun

et al. 2023

BMC Plant Biol

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Background Cymbidium ensifolium L. is known for its ornamental value and is frequently used in cosmetics. Information about the salt stress response of C. ensifolium is scarce. In this study, we reported the physiological and transcriptomic responses of C. ensifolium leaves under the influence of 100 mM NaCl stress for 48 (T48) and 96 (T96) hours. Results Leaf Na+ content, activities of the antioxidant enzymes i.e., superoxide dismutase, glutathione S-transferase, and ascorbate peroxidase, and malondialdehyde content were increased in salt-stressed leaves of C. ensifolium. Transcriptome analysis revealed that a relatively high number of genes were differentially expressed in CKvsT48 (17,249) compared to CKvsT96 (5,376). Several genes related to salt stress sensing (calcium signaling, stomata closure, cell-wall remodeling, and ROS scavenging), ion balance (Na+ and H+), ion homeostasis (Na+/K+ ratios), and phytohormone signaling (abscisic acid and brassinosteroid) were differentially expressed in CKvsT48, CKvsT96, and T48vsT96. In general, the expression of genes enriched in these pathways was increased in T48 compared to CK while reduced in T96 compared to T48. Transcription factors (TFs) belonging to more than 70 families were differentially expressed; the major families of differentially expressed TFs included bHLH, NAC, MYB, WRKY, MYB-related, and C3H. A Myb-like gene (CenREV3) was further characterized by overexpressing it in Arabidopsis thaliana. CenREV3’s expression was decreased with the prolongation of salt stress. As a result, the CenREV3-overexpression lines showed reduced root length, germination %, and survival % suggesting that this TF is a negative regulator of salt stress tolerance. Conclusion These results provide the basis for future studies to explore the salt stress response-related pathways in C. ensifolium.

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“…The high of antioxidant activity is required to combat the toxic reactive oxygen species that emerge in the environment [37]. A similar phenomenon on the increased of antioxidant activity occur on orchid which is exposed to other abiotic stress as a result of molecular intervention [38].…”

Section: Effects Of the Elf-emf On The Growth And Biochemical Charactmentioning

confidence: 99%

The Stimulated Growth of Tissue Cultured Banana and Slipper Orchid as Exposed to Extremely Low Frequency Electromagnetic Field

Prihatini¹,

Saleh²

2020

IJDNE

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Extremely low frequency electromagnetic field (ELF-EMF) naturally occurs in the environment as the use of electricity become more intense, thus affecting the life of all organisms includes plants, both positive and negative way. The study of to determine the real effect of EFL-EMF was conducted using tissue culture plants in two different plants, banana (Musa acuminata cv. Barangan) and orchid (Paphiopedilum rothscildianum). Banana and orchid plantlets were exposed to 6 and 12 mT ELF-EMF for 0.5, 1, 2, and 4 hours. Four weeks after exposure, the growth and biochemical parameters were investigated. The results showed that 6 mT ELF-EMF had significantly promoted the growth and development of both banana and orchid plantlets for 0.5 and 4 hours duration of exposures, respectively. The long period of exposure of banana plant to ELF-EMF reduced the growth and antioxidant enzyme activities. On the other hand, the orchid exposed to 12 mT ELF-EMF for 4 hours produced the highest shoot number.

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Molecular Interventions to Ameliorate Environmental Stresses in Orchids

Cited by 5 publications

References 119 publications

Seasonality Affects Low-Molecular-Weight Organic Acids and Phenolic Compounds’ Composition in Scots Pine Litterfall

Seasonality Affects Low-Molecular-Weight Organic Acids and Phenolic Compounds’ Composition in Scots Pine Litterfall

Transcriptome analysis reveals the key pathways and candidate genes involved in salt stress responses in Cymbidium ensifolium leaves

The Stimulated Growth of Tissue Cultured Banana and Slipper Orchid as Exposed to Extremely Low Frequency Electromagnetic Field

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