Abstract
Species of Diaporthe (syn. Phomopsis ) are important endophytes, saprobes and pathogens, infecting a wide range of plants and resulting in important crop diseases. However, the species occurring on pear remain largely unresolved. In this study, a total of 453 Diaporthe isolates were obtained from branches of Pyrus plants (including P. bretschneideri , P. communis , P. pyrifolia and P. ussuriensis collected from 12 provinces in China) showing shoot canker symptoms. Phylogenetic analyses based on five loci (ITS, TEF , CAL , HIS , and TUB ) coupled with morphology of 113 representative isolates revealed that 19 Diaporthe species were isolated, representing 13 known species (including D. caryae , D. cercidis , D. citrichinensis , D. eres , D. fusicola , D. ganjae , D. hongkongensis , D. padina , D. pescicola , D. sojae , D. taoicola , D. unshiuensis and D. velutina ) and six new species described here as D. acuta , D. chongqingensis , D. fulvicolor , D. parvae , D. spinosa and D. zaobaisu . Although Koch's postulates confirmed all species to be pathogenic, a high degree of variation in aggressiveness was observed. Moreover, these species have a high diversity, plasticity, and prevalence related to the geographical location and pear species involved.
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Claims 6
Claim · model-written summary
Nineteen Diaporthe species were isolated from cankered Pyrus branches.
Pyrus
DiaportheOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“19 Diaporthe species were isolated”
e1“branches of Pyrus plants”
t0“pear shoot canker”
Claim · model-written summary
Thirteen known Diaporthe species were identified.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“13 known species”
e1“19 Diaporthe species were isolated”
e2“branches of Pyrus plants”
Claim · model-written summary
Six new Diaporthe species were described.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“six new species described here as D. acuta , D. chongqingensis , D. fulvicolor , D. parvae , D. spinosa and D. zaobaisu”
e1“branches of Pyrus plants”
e2“19 Diaporthe species were isolated”
Claim · model-written summary
Koch’s postulates confirmed all isolated species as pathogenic.
- Outcome
- all species to be pathogenice0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Koch's postulates confirmed all species to be pathogenic”
e1“branches of Pyrus plants”
e2“19 Diaporthe species were isolated”
Claim · model-written summary
Diaporthe species varied greatly in aggressiveness.
- Outcome
- variation in aggressivenesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a high degree of variation in aggressiveness was observed”
e1“19 Diaporthe species were isolated”
e2“branches of Pyrus plants”
Claim · model-written summary
Diaporthe diversity, plasticity and prevalence were related to location and pear species.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these species have a high diversity, plasticity, and prevalence related to the geographical location and pear species involved”
e1“19 Diaporthe species were isolated”
e2“branches of Pyrus plants”