Enhancement of Festuca rubra L. germination and seedling growth by seed treatment with pathogenic Agrobacterium rhizogenes

Król, Paulina; Adamska, Jolanta; Kępczyńska, Ewa

doi:10.1007/s11738-014-1692-8

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…The robust growth of roots improves plant fitness due to enhanced water and nutrient uptake through the root from an early growth stage. These growth-promoting effects have also been reported in other studies [ 27 , 35 , 36 ]. Blinskov et al (2014) also emphasized the importance of rapid growth in some areas of high latitude where the arable period is short, representing the effect of Klebsiella planticola TSKhA-91 strain, which induced rapid germination and growth of cucumber seedling under cold stress [ 17 ].…”

Section: Discussionsupporting

confidence: 87%

A highly efficient auxin-producing bacterial strain and its effect on plant growth

Park¹,

Kim²,

Hong³

et al. 2021

Journal of Genetic Engineering and Biotechnology

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Background Various bacteria promote plant root growth in the rhizosphere, as a measure of securing and enlarging their ecological niche. These interactions are mediated by plant growth regulators (PGRs) such as auxin, and indole-3-acetic acid (IAA) is one of the physiologically active auxin. In this study, we isolated an unusual bacterial strain from food process waste with high efficiency and demonstrated its effects on plant rooting and early-stage growth. Results The efficiency of this bacterial strain in producing IAA was 16.6 mg/L/h in Luria-Bertani broth containing 0.05% l-tryptophan (Trp) at room temperature (24 ± 2 °C). Its IAA production was highly dependent on the presence of precursor, Trp. This bacterium was identified as Ignatzschineria sp. by 16S rDNA sequencing. Its bacterial culture supernatant (BCS) enhanced plant root initiation, root growth, and plant growth in the early stages. The root mass formed BCS-treated in apple mint cuttings was twofold of that formed in the control. The root number and length were 46% and 18% higher, respectively, in BCS-treated chrysanthemum cuttings than in the control. Conclusions These results show that the BCS of Ignatzschineria sp. CG20001 isolate obtained in this study can be used for agricultural applications. In addition, the novelty of this strain makes it a valuable genetic resource for biotechnological applications.

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Section: Discussionsupporting

confidence: 87%

A highly efficient auxin-producing bacterial strain and its effect on plant growth

Park¹,

Kim²,

Hong³

et al. 2021

Journal of Genetic Engineering and Biotechnology

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“…In general, the highest M. truncatula seedling growth promotion was obtained after inoculation with strains which produced most of the IAA (between 30 and 47 µg ml −1 ), with simultaneous absence or very low activity of ACCD. Previously, we also suggested that IAA production rather than ACCD activity in two Agrobacterium rhizogenes strains, 15834 and LBA1334, might be responsible for the stimulation of the grass Festuca rubra L. seed germination, seedling emergence and development upon seed inoculation; mainly by increasing growth of lateral roots and more complex architecture of the branching root system (Król et al 2014 ). We compared the effects of seed inoculation of the two strains tested with the ability to produce IAA and of exogenous application of IAA at concentrations corresponding to IAA production by these strains.…”

Section: Discussionmentioning

confidence: 94%

Medicago truncatula Gaertn. as a model for understanding the mechanism of growth promotion by bacteria from rhizosphere and nodules of alfalfa

Kisiel

Kępczyńska

2016

Planta

Self Cite

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Main conclusionThe present study showed all the 16 strains isolated and identified from the alfalfa rhizosphere and nodules, and registered in GenBank, to be good candidates for targeted use in studies addressing the rather weak known mechanism of plant growth promotion, including that ofMedicago truncatula,a molecular crop model.Based on physiological, biochemical and molecular analysis, the 16 isolates obtained were ascribed to the following five families: Bacillaceae, Rhizobiaceae, Xantomonadaceae, Enterobacteriaceae and Pseudomonadaceae, within which 9 genera and 16 species were identified. All these bacteria were found to significantly enhance fresh and dry weight of root, shoots and whole 5-week-old seedlings. The bacteria were capable of the in vitro use of tryptophan to produce indolic compounds at various concentrations. The ability of almost all the strains to enhance growth of seedlings and individual roots was positively correlated with the production of the indolic compounds (r = 0.69; P = 0.0001), but not with the 1-aminocyclopropane-1-carboxylate deaminase (ACCD) activity (no correlation). For some strains, it was difficult to conclude whether the growth promotion was related to the production of indolic compounds or to the ACCD activity. It is likely that promotion of M. truncatula root development involves also root interaction with pseudomonads, known to produce 2,4-diacetylphloroglucinol (DAPG), a secondary metabolite reported to alter the root architecture by interacting with an auxin-dependent signaling pathway. Inoculation of seedlings with Pseudomonas brassicacearum KK 5, a bacterium known for its lowest ability to produce indolic compounds, the highest ACCD activity and the presence of the phlD gene responsible for DAPG precursor synthesis, resulted in a substantial promotion of root development. Inoculation with the strain increased the endogenous IAA level in M. truncatula leaves after inoculation of 5-week-old seedlings. Three other strains examined in this study also increased the IAA level in the leaves upon inoculation. Moreover, several other factors such as mobilization of phosphorus and zinc to make them available to plants, iron sequestration by siderophore production and the ability to ammonia production also contributed substantially to the phytostimulatory biofertilizing potential of isolated strains. There is, thus, evidence that Medicago truncatula growth promotion by rhizobacteria involves more than one mechanism.Electronic supplementary materialThe online version of this article (doi:10.1007/s00425-016-2469-7) contains supplementary material, which is available to authorized users.

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“…A poor seedling emergence leads to a poor turfgrass stand, and weed infestations (Shiade & Boelt, 2020) results waste of time and resources. It is very important, particularly under sub-optimal conditions, to reduce the period between sowing and seedling emergence in turfgrass (Krol et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Duman Solüsyonlarına Maruz Kalan Bazı Çim Türlerinin Çimlenme ve Fide Büyümesi

Özbek

Başaran

Doğrusöz

2021

Yüzüncü Yıl Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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This study aimed to investigate the effect of priming with plantderived smoke solutions (SS) on the germination, seedling growth and chemical content of three turfgrass species (Lolium perenne, Festuca arundinacea, Poa pratensis). SS was applied at six concentrations (0, 0.5, 1, 5, 10 and 20%) in petri and pot conditions. In petri condition, SS did not stimulate the germination speed, and the highest concentrations (20%) led to lower values than control. In the pot conditions, seedling growth and chemical content were significantly stimulated by the SS. The effect of the SS varied depending on the species and concentrations. Shoot and root length in grass species were improved by the SS, except in P. pratensis for shoot length. Compared to control, higher shoot dry weight in F. arundinacea (1%) and higher root dry weight in L. perenne (5%) and F. arundinacea (0.5%) were determined at certain concentrations. These results showed that priming with SS at appropriate concentrations may lead to healthy and vigorous seedlings. When seedling vigor and visuality are evaluated together, it has been determined that priming with low concentrations of SS such as 0.5 and 1% can produce vigorous seedling.

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Enhancement of Festuca rubra L. germination and seedling growth by seed treatment with pathogenic Agrobacterium rhizogenes

Cited by 7 publications

References 45 publications

A highly efficient auxin-producing bacterial strain and its effect on plant growth

A highly efficient auxin-producing bacterial strain and its effect on plant growth

Medicago truncatula Gaertn. as a model for understanding the mechanism of growth promotion by bacteria from rhizosphere and nodules of alfalfa

Duman Solüsyonlarına Maruz Kalan Bazı Çim Türlerinin Çimlenme ve Fide Büyümesi

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