Inter-organismal signaling and management of the phytomicrobiome

Smith, Donald L.; Praslickova, Dana; Ilangumaran, Gayathri

doi:10.3389/fpls.2015.00722

Cited by 67 publications

(48 citation statements)

References 72 publications

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“…These factors and interactions in turn affect the microbial populations, plant health and productivity. Proliferation of the PGPMs regulates aspects of each other's behavior by manipulating the microbiome to optimize plant functions by reducing disease susceptibility, abiotic stress, and increasing nutrient availability and yields [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Trichoderma koningiopsis on Chickpea Rhizosphere Activities under Different Fertilization Regimes

Tandon¹,

Fatima²,

Gautam³

et al. 2018

OJSS

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Interaction of plant growth promoting microorganisms (PGPMs) with plants involves interplay at physical, physiological and molecular levels. Proliferation and root colonization of PGPMs manipulate the rhizosphere to optimize plant functions. This benefits plant by nutrient enrichment and induction of plant vigor and defense system. The present work aims to decipher the rhizosphere modulations promoted under different fertilization regimes by an organic acid producing Trichoderma koningiopsis strain (NBRI-PR5). Chickpea was selected as the host plant for the study since it responds well to the application of in/organic fertilizers and PGPMs. Microbial communities associated with the rhizosphere were studied by determining culturable population of heterogeneous microflora, and rhizosphere functions were studied by determining the soil enzyme activities and HPLC profiles of organic acids in root exudates. Application of NBRI-PR5 induced changes in rhizosphere in consent with the amendments. The changes observed in microbial populations were found to be associated with the rhizosphere enzymes. The inhibitory effect of chemical fertilizers on rhizosphere microflora was evident from least bacterial CFU observed in the NPK treatments. No detection of alkaline phosphatase enzyme in all the treatments with NBRI-PR5, with organic or inorganic amendments evidently represents the acidified rhizosphere. Similarly, an opposite trend in DHA and protease enzyme activities in the rhizosphere of FYM and FYM+PR5 treated plants showed that NBRI-PR5 had reframed microbial activities to facilitate nutrient uptake in plants rather than fix in the microbes. It is concluded from the study that NBRI-PR5 fatefully modulates rhizosphere activities, specific to different fertilization regimes by varying the enzyme activities to maximize the utilization of available nutrients.

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Section: Introductionmentioning

confidence: 99%

Effect of Trichoderma koningiopsis on Chickpea Rhizosphere Activities under Different Fertilization Regimes

Tandon¹,

Fatima²,

Gautam³

et al. 2018

OJSS

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“…promote plant health, growth, and resilience as they improve nutrient availability [24], however, the functional roles of these bacteria in the phytomicrobiome have not been discovered yet [25]. Celosia genus is native to tropical America and Africa.…”

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confidence: 99%

Chemical Traits of Fermented Alfalfa Brown Juice: Its Implications on Physiological, Biochemical, Anatomical, and Growth Parameters of Celosia

et al. 2020

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Brown juice is a byproduct of fractionated green biomass during leaf protein isolation. It represents approximately 45%–50% of the total pressed fresh biomass. Disposal of brown juice is a serious issue in leaf protein production due to its high biological oxygen demand and carbohydrates content. The current study aimed to find a possible potential use of brown juice. Therefore, chemical and biochemical properties of brown juice—derived from alfalfa green biomass—were determined before and after fermentation by lactic acid bacteria. Additionally, the growth stimulation potential of fermented brown juice on plumed cockscomb (Celosia argantea var. plumose ‘Arrabona’) plants were tested. Celosia seedlings were sprayed at different rates of fermented brown juice (i.e., 0.5%, 1%, 2.5%, 5%, and 10%) and tap water was applied as control. The results revealed that lactic acid bacteria successfully enhanced the stabilization of brown juice via reducing sugars content and increasing organic acids content. After fermentation, contents of glucose monomers were 15 times lower; while concentrations of lactic and acetic acids increased by 7- and 10-fold, respectively. This caused a reduction in the pH of fermented brown juice by 13.9%. Treating Celosia plants at lower rates of fermented brown juice (up to 1.0%) significantly induced their growth dynamics and antioxidant capacity. Higher values of vegetative parameters were measured in treated plants compared to control. The brown juice treatments caused significant changes in histological parameters as well. The activity of catalase and peroxidase increased in plants that received fermented brown juice especially at low rates. Moreover, an increase in water-soluble protein and phenol was measured in different tissues of plants sprayed with fermented brown juice. Malondialdehyde content was lowered in treated plants compared to control. Fermented brown juice at high rates slightly reduced the amount of photosynthetic pigments; however, this reduction was not reported for low rates of fermented brown juice. These results surely illustrate the potential use of fermented alfalfa brown juice as a growth stimulator for crops particularly at rates below 2.5%.

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“…Other possible solutions are to impose a cost, such that the host environment is toxic for organisms without the correct physiology, such as in the squid-light symbiotic organ (Vibrio fischeri-Euprymna scolopes) [56] or to directly couple the transfer of nutrients from one partner to the other [52]. As we understand more about these 'rules of engagement', we can begin to manipulate communication to our benefit, enhancing positive associations, and decreasing negative ones [27].…”

Section: Resultsmentioning

confidence: 99%

“…A long-standing hypothesis suggests that cues are precursors to signals [26]. Studying the evolutionary origins of signals helps us understand how microbes and plants may manipulate and co-opt molecules [27,28]. For example, endophytes in the genus Colletotrichum are generally pathogens, but the species C. tofieldiae is beneficial, providing phosphorus to hosts based on the hosts' phosphate starvation response [29].…”

Section: Signal Versus Cue: Why Does It Matter?mentioning

confidence: 99%

Signals and cues in the evolution of plant–microbe communication

Padje

Whiteside

Kiers

2016

Current Opinion in Plant Biology

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Communication has played a key role in organismal evolution. If sender and receiver have a shared interest in propagating reliable information, such as when they are kin relatives, then effective communication can bring large fitness benefits. However, interspecific communication (among different species) is more prone to dishonesty. Over the last decade, plants and their microbial root symbionts have become a model system for studying interspecific molecular crosstalk. However, less is known about the evolutionary stability of plant-microbe communication. What prevents partners from hijacking or manipulating information to their own benefit? Here, we focus on communication between arbuscular mycorrhizal fungi and their host plants. We ask how partners use directed signals to convey specific information, and highlight research on the problem of dishonest signaling.

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Inter-organismal signaling and management of the phytomicrobiome

Cited by 67 publications

References 72 publications

Effect of Trichoderma koningiopsis on Chickpea Rhizosphere Activities under Different Fertilization Regimes

Effect of Trichoderma koningiopsis on Chickpea Rhizosphere Activities under Different Fertilization Regimes

Chemical Traits of Fermented Alfalfa Brown Juice: Its Implications on Physiological, Biochemical, Anatomical, and Growth Parameters of Celosia

Signals and cues in the evolution of plant–microbe communication

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