Abstract
The relationship between Rhododendron simsii and its soil microbial community under heat stress was not clear. In this study, the effects of heat stress on the physiological characteristics, soil physicochemical properties and soil microbial community structure of R. simsii were investigated. The experimental control (CK) was set as day/night (14/10 h) 25/20°C and experimental treatments were set as light heat stress (LHS) 35/30°C and high heat stress (HHS) 40/35°C. Our results showed that, compared with CK, LHS treatment significantly increased malondialdehyde, hydrogen peroxide, proline and soluble sugar contents, as well as catalase and peroxidase activities, while HHS treatment significantly increased ascorbate peroxidase activity and decreased chlorophyll content. Compared with CK, LHS treatment significantly reduced soil ammonium-nitrogen and nitrate-nitrogen content, while HHS significantly increased soil ammonium-nitrogen content. Compared with CK, both treatments changed the soil microbial community structure. For bacterial community, LHS and HHS treatment resulting in the significant enrichment of Burkholderia-Caballeronia-Paraburkholderia and Occallatibacte , respectively. For fungal community, LHS treatment resulting in the significant enrichment of Candida, Mortierella and Boothiomyces . The redundancy analysis showed that plant physiological characteristics, soil ammonium-nitrogen content were significantly correlated with the soil microbial community. Therefore, heat stress altered the soil microbial community structure, and affected the availability of soil available nitrogen, which in turn affected the physiological characteristics of R. simsii . We suggest that soil microbial community may play an important role in plant resistance to heat stress, and its mechanism deserves further study.
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Claims 12
Claim · model-written summary
Light heat stress increased malondialdehyde, hydrogen peroxide, proline, and soluble sugar contents.
- Taxon
- Rhododendron simsii
Rhododendron simsiit0 - Treatment
- LHS treatmente0
- Outcome
- malondialdehyde, hydrogen peroxide, proline and soluble sugar contentse0
- Direction
- increasede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared with CK, LHS treatment significantly increased malondialdehyde, hydrogen peroxide, proline and soluble sugar contents”
t0“Rhododendron simsii”
Claim · model-written summary
Light heat stress increased catalase and peroxidase activities.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- LHS treatmente0
- Outcome
- catalase and peroxidase activitiese0
- Direction
- increasede0
- Comparator
- CKe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LHS treatment significantly increased malondialdehyde, hydrogen peroxide, proline and soluble sugar contents, as well as catalase and peroxidase activities”
e1“compared with CK”
t0“Rhododendron simsii”
Claim · model-written summary
High heat stress increased ascorbate peroxidase activity.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- HHS treatmente0
- Outcome
- ascorbate peroxidase activitye0
- Direction
- increasede0
- Comparator
- CKe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HHS treatment significantly increased ascorbate peroxidase activity and decreased chlorophyll content”
e1“compared with CK”
t0“Rhododendron simsii”
Claim · model-written summary
High heat stress decreased chlorophyll content.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- HHS treatmente0
- Outcome
- chlorophyll contente0
- Direction
- decreasede0
- Comparator
- CKe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HHS treatment significantly increased ascorbate peroxidase activity and decreased chlorophyll content”
e1“compared with CK”
t0“Rhododendron simsii”
Claim · model-written summary
Light heat stress reduced soil ammonium-nitrogen and nitrate-nitrogen contents.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- LHS treatmente0
- Outcome
- soil ammonium-nitrogen and nitrate-nitrogen contente0
- Direction
- reducede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK, LHS treatment significantly reduced soil ammonium-nitrogen and nitrate-nitrogen content”
t0“Rhododendron simsii”
Claim · model-written summary
High heat stress increased soil ammonium-nitrogen.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- HHSe0
- Outcome
- soil ammonium-nitrogen contente0
- Direction
- increasede0
- Comparator
- CKe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK, LHS treatment significantly reduced soil ammonium-nitrogen and nitrate-nitrogen content, while HHS significantly increased soil ammonium-nitrogen content”
t0“Rhododendron simsii”
Claim · model-written summary
Both heat treatments changed soil microbial community structure.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- light heat stress (LHS) 35/30°C and high heat stress (HHS) 40/35°Ce1
- Outcome
- soil microbial community structuree0
- Comparator
- CKe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with CK, both treatments changed the soil microbial community structure.”
e1“light heat stress (LHS) 35/30°C and high heat stress (HHS) 40/35°C”
t0“Rhododendron simsii”
Claim · model-written summary
Light heat stress enriched Burkholderia-Caballeronia-Paraburkholderia.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- LHSe0
- Outcome
- Burkholderia-Caballeronia-Paraburkholderiae0
- Direction
- enrichmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LHS and HHS treatment resulting in the significant enrichment of Burkholderia-Caballeronia-Paraburkholderia and Occallatibacte , respectively”
t0“Rhododendron simsii”
Claim · model-written summary
High heat stress enriched Occallatibacte.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- HHSe0
- Outcome
- Occallatibactee0
- Direction
- enrichmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LHS and HHS treatment resulting in the significant enrichment of Burkholderia-Caballeronia-Paraburkholderia and Occallatibacte , respectively”
t0“Rhododendron simsii”
Claim · model-written summary
Light heat stress enriched Candida, Mortierella, and Boothiomyces.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Treatment
- LHS treatmente0
- Outcome
- Candida, Mortierella and Boothiomycese0
- Direction
- enrichmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“LHS treatment resulting in the significant enrichment of Candida, Mortierella and Boothiomyces”
t0“Rhododendron simsii”
Claim · model-written summary
Plant physiological characteristics and soil ammonium nitrogen correlated with soil microbial community.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Outcome
- soil microbial communitye0
- Qualifier
- plant physiological characteristics, soil ammonium-nitrogen contente0
- Setting
- soile0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant physiological characteristics, soil ammonium-nitrogen content were significantly correlated with the soil microbial community”
t0“Rhododendron simsii”
Claim · model-written summary
The authors suggest soil microbes may contribute to heat resistance.
- Taxon
- Rhododendron simsiiRhododendron simsiit0
- Outcome
- plant resistance to heat stresse0
- Qualifier
- soil microbial communitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil microbial community may play an important role in plant resistance to heat stress”
t0“Rhododendron simsii”