Attenuation of light influences the size of Microcystis colonies

Feng, Ganyu; Zhu, Wei; Siyuan, HU; Xue, Zhaohui; Wang, Ruochen; Chen, Huaimin

doi:10.1016/j.hal.2019.101667

Cited by 14 publications

(13 citation statements)

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“…Due to the seasonal diversity in colony morphology and dimension as described above, this study supposes that stress or pressure can force or induce Microcystis to alter its structure and size. A recent investigation demonstrated a tradeoff between colony size and structure, whereby large colonies tended to grow loosely in order to relieve intra-colony light limitations (Feng et al 2019). The theory indicated the potential formation of holes or pores in large colonies, which might be a transitional stage between M. ichthyoblabe and M. aeruginosa, and was analyzed in the present study.…”

mentioning

confidence: 76%

“…OR and IMR present the linear regression of all samples and the interval maxima, respectively. The optical limitation represents the limit of light on the maximum colony thickness (B Max ) and tightness (c) according to the following equation: B Max = 4.3 × 10 5 Á c −1 (Feng et al 2019). The number of IMR intervals is 18 [Colour figure can be viewed at wileyonlinelibrary.com] STRUCTURAL VARIATION AND SIZE LIMIT OF MICROCYSTIS turbulent mixing.…”

Section: Discussionmentioning

confidence: 99%

“…One of the growth traits of Microcystis is the decrease in colonial tightness under larger colony sizes. Large and tight structures adversely affect the allocation of resources, such as light (Feng et al 2019), carbon (Paerl 1983), and dissolved oxygen (Fang et al 2018). Therefore, variations in colonial structure may be a result of the constraints from colony size and cellular metabolism, which is apparent under environmental stresses such as nutritional limits or shear.…”

Section: Discussionmentioning

confidence: 99%

“…Microcystis colonies were found to have a growth rate of 0.2-0.4 Á d −1 , which was lower than that of single cells (Li et al 2013b) and negatively related to the size of colonies (Wilson et al, 2010). Additionally, inorganic carbon, light intensity, and dissolved oxygen were reported non-uniformly distributed or internally restricted in large colonies (Paerl 1983, Fang et al 2018, Feng et al 2019. These findings raise the question of how the structures of colonies respond to elevated colony size and concomitant intra-colony resource limits.…”

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confidence: 94%

“…2018, Feng et al. 2019). These findings raise the question of how the structures of colonies respond to elevated colony size and concomitant intra‐colony resource limits.…”

mentioning

confidence: 99%

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Structural Variations Increase the Upper Limit of Colony Size ofMicrocystis: Implications from Laboratory Cultures and Field Investigations

Feng

Zhu

Xue

et al. 2020

Journal of Phycology

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Wild Microcystis have highly diverse colonial structures and sizes, including variable colony geometry, cell arrangement, and diameter. These structural and dimensional variations may play an important role in continual, frequent Microcystis blooms during summer and autumn, the cause of which still remains unclear. Here, laboratory cultures and field investigations were applied to assess mechanisms that drive variation in structure and size, as well as factors that influence diversity. The results demonstrated that colonies grew to large sizes at the expense of their structure being loose and inhomogeneous. Furthermore, colonies may spontaneously change structure to relieve the constraints of size in return. Influencing factors (nutrient limits and turbulent shear) tended to promote these variations. Our work highlights that the diversity of Microcystis colonies may be a result of structural variations as survival strategies for gaining a higher upper size limit. Therefore, during seasonal successions, large colonies commonly have porous or loosely arranged structures, such as in M. aeruginosa. Additionally, this study hypothesized three possible transition routes for better understanding structural diversity and variations in Microcystis.

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confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 94%

“…2018, Feng et al. 2019). These findings raise the question of how the structures of colonies respond to elevated colony size and concomitant intra‐colony resource limits.…”

mentioning

confidence: 99%

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