A mechanistic view on lodging resistance in rye and wheat: a multiscale comparative study.
Fourier-transform infrared spectroscopy
QTL mapping
cell wall
lodging resistance
nuclear magnetic resonance imaging
scanning electron microscopy
Journal
Plant biotechnology journal
ISSN: 1467-7652
Titre abrégé: Plant Biotechnol J
Pays: England
ID NLM: 101201889
Informations de publication
Date de publication:
12 2021
12 2021
Historique:
revised:
10
07
2021
received:
06
01
2020
accepted:
22
08
2021
pubmed:
28
8
2021
medline:
19
3
2022
entrez:
27
8
2021
Statut:
ppublish
Résumé
The development of crop varieties that are resistant to lodging is a top priority for breeding programmes. Herein, we characterize the rye mutant ´Stabilstroh' ('stable straw') possessing an exceptional combination of high lodging resistance, tall posture and high biomass production. Nuclear magnetic resonance imaging displayed the 3-dimensional assembly of vascular bundles in stem. A higher number of vascular bundles and a higher degree of their incline were the features of lodging-resistant versus lodging-prone lines. Histology and electron microscopy revealed that stems are fortified by a higher proportion of sclerenchyma and thickened cell walls, as well as some epidermal invaginations. Biochemical analysis using Fourier-transform infrared spectroscopy and inductively coupled plasma-optical emission spectrometry further identified elevated levels of lignin, xylan, zinc and silicon as features associated with high lodging resistance. Combined effects of above features caused superior culm stability. A simplistic mathematical model showed how mechanical forces distribute within the stem under stress. Main traits of the lodging-resistant parental line were heritable and could be traced back to the genetic structure of the mutant. Evaluation of lodging-resistant wheat 'Babax' ('Baviacora') versus contrasting, lodging-prone, genotype ´Pastor´ agreed with above findings on rye. Our findings on mechanical stability and extraordinary culm properties may be important for breeders for the improvement of lodging resistance of tall posture cereal crops.
Identifiants
pubmed: 34449959
doi: 10.1111/pbi.13689
pmc: PMC8633492
doi:
Substances chimiques
Lignin
9005-53-2
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
2646-2661Informations de copyright
© 2021 The Authors. Plant Biotechnology Journal published by Society for Experimental Biology and The Association of Applied Biologists and John Wiley & Sons Ltd.
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Plant Biotechnol J. 2021 Dec;19(12):2646-2661
pubmed: 34449959