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Role of morphological traits and cell wall components in imparting resistance to pink stem borer,Sesamia inferens Walker in maize

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Title Role of morphological traits and cell wall components in imparting resistance to pink stem borer,Sesamia inferens Walker in maize
Not Available
 
Creator Soujanya PL
Sekhar JC
Karjagi CG
Ratnavathi CV
Venkateswarlu R
Yathish KR
Suby SB
Sunil N
Rakshit S
 
Subject maize, host plant resistance, damage parameters, pink stem borer, antibiosis, biochemical constituents
 
Description Not Available
Host Plant Resistance (HPR) is the most important component for sustainable
management of insect pests. The purpose of the present work was to understand
the role of various morphological and biochemical factors as defense mechanism
and their interaction on different biological parameters attributed to survival and
development of pink stem borer (PSB), Sesamia inferens Walker in maize. The
resistant and moderately resistant genotypes (DMRE 63, CM 500 and WNZ Exotic
pool) suffered least leaf injury rating (LIR), dead hearts (DH%), percentage stem
tunneling (ST%), number of entry/exit holes (E/EH) and showed deleterious effects
on biological parameters of pink stem borer as compared to susceptible ones (CM
202 and BML 6). Resistance index among the genotypes varied from 0.11 to 0.46.
The variation in morphological traits such as number of nodes, internode distance
and stem diameter could not distinguish all the resistant genotypes from that of
susceptible genotypes in terms of its mean value. Higher levels of biochemical
constituents, viz., p-Coumaric acid (p-CA), ferulic acid (FA), acid detergent fibre
(ADF) and acid detergent lignin (ADL) were observed in resistant genotypes
compared to susceptible ones. Antibiosis was expressed in terms of reduced
pupal weight when fed on WNZ Exotic pool, whereas larval weight and larval
survival affected when fed on DMRE 63. Higher concentration of p-CA content in
pith of resistant maize genotypes prolonged the pupal period of pink stem borer.
Higher concentration of p-CA and FA contents in rind reduced the adult
emergence, as they showed significant negative correlation between them. The
larval period was prolonged with higher levels of ADF and ADL contents in maize
genotypes either in rind or both rind and pith as both ADF and ADL content showed
a significant positive correlation with the larval period. The Pearson correlation
analysis of most of the biochemical constituents revealed significant negative
correlation with damage parameters. The correlation coefficients between p-CA
with DH (%), ST (%) and E/EH were r= -0.9642, r= -0.9363, and r= -0.9646,
respectively. Similarly, the correlation coefficients between FA with DH (%), ST (%)
and E/EH were r= -0.9217, r= -0.9563, and r= -0.9434, respectively and ADF with DH (%), ST (%) and E/EH were r= -0.9506, r= -0.9611, and r= -0.9709,
respectively. The study confirms that stem damage parameters can also be used as
selection criteria along with LIR to identify resistant genotypes against pink stem
borer. Based on the correlation analysis it was concluded that resistance to pink
stem borer in maize is the result of interaction of several morphological and
biochemical traits rather than a single factor. The findings obtained from the
present study can be utilised in pink stem borer resistance breeding programmes
to enhance and diversify the basis of resistance.
Not Available
 
Date 2024-03-30T20:55:17Z
2024-03-30T20:55:17Z
2024-07-10
 
Type Research Paper
 
Identifier Soujanya PL, Sekhar JC, Karjagi CG,Ratnavathi CV, Venkateswarlu R,Yathish KR, Suby SB, Sunil N and Rakshit S (2023) Role of morphological traits and cell wall components in imparting resistance to pink stem borer,Sesamia inferens Walker in maize.Front. Plant Sci. 14:1167248. doi: 10.3389/fpls.2023.1167248
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/81697
 
Language English
 
Relation Not Available;
 
Publisher Frontiers in plant science