Abstract
Chickpea is adversely affected by drought stress at all the growth stages including germination and seedling emergence thereby seedling establishment. An in vitro screening method was used to screen the genotypes for drought tolerance using polyethylene glycol (PEG) 6000. Six drought related seedling traits viz. germination percentage, shoot length (cm), root length (cm), shoot-root ratio, number of secondary roots and relative water content were studied in fifteen genotypes including thirteen MAGIC lines and two varieties JG 11 and HC 5. PEG solutions of 3%, 5% and 7% were used to induce different levels of water stress to compare with control (0%). Analysis of variance revealed significant variability among genotypes, different levels of PEG as well as between genotypes and stress levels. In general a decrease in the mean values under subsequent water induced stress was observed as compared to control in all the six traits under study with few exceptions like root length and shoot root ratio. The root of few genotypes viz. M 31, JG 11, HC 5, M 30 and M 27 increased with increase in stress level. Similarly, shoot root ratio also increased in two genotypes namely M 37 and M 32. Considering complex and quantitative nature of drought tolerance, drought related traits were assigned rank score given to each genotype in order of showing increase or minimum decrease in that seedling trait at control and 7% PEG induced stress levels. Total sum of scores over six seedling parameters revealed that JG 11 was most drought tolerant among all fifteen genotypes under study with total score of seventy six, followed by HC 5 whereas M33 was the most susceptible genotype for drought tolerance.
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Claims 7
Claim · model-written summary
Genotypes and PEG levels showed significant variability for drought-related seedling traits.
- Taxon
- Chickpea
Cicer arietinumt0 - Treatment
- different levels of PEGe0
- Outcome
- significant variabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of variance revealed significant variability among genotypes, different levels of PEG as well as between genotypes and stress levels”
t0“chickpea”
Claim · model-written summary
PEG-induced stress generally decreased germination percentage, shoot length, secondary root number and relative water content compared with control.
- Taxon
- chickpeaCicer arietinumt0
- Treatment
- water induced stresse0
- Outcome
- mean valuese0
- Direction
- decreasee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general a decrease in the mean values under subsequent water induced stress was observed as compared to control in all the six traits under study with few exceptions like root length and shoot root ratio”
t0“chickpea”
Claim · model-written summary
Root length increased with stress in M 31, JG 11, HC 5, M 30 and M 27.
- Taxon
- chickpeaCicer arietinumt0
- Material
- M 31, JG 11, HC 5, M 30 and M 27e0
- Treatment
- increase in stress levele0
- Outcome
- roote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root of few genotypes viz. M 31, JG 11, HC 5, M 30 and M 27 increased with increase in stress level”
t0“chickpea”
Claim · model-written summary
Shoot-root ratio increased in M 37 and M 32.
- Taxon
- chickpeaCicer arietinumt0
- Material
- M 37 and M 32e0
- Outcome
- shoot root ratioe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot root ratio also increased in two genotypes namely M 37 and M 32”
t0“chickpea”
Claim · model-written summary
JG 11 was the most drought-tolerant genotype, scoring seventy six.
- Taxon
- chickpeaCicer arietinumt0
- Material
- JG 11e0
- Outcome
- drought tolerante0
- Direction
- moste0
- Value
- seventy sixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JG 11 was most drought tolerant among all fifteen genotypes under study with total score of seventy six”
t0“chickpea”
Claim · model-written summary
HC 5 ranked after JG 11 for drought tolerance.
- Taxon
- chickpeaCicer arietinumt0
- Material
- HC 5e0
- Outcome
- drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“followed by HC 5 whereas M33 was the most susceptible genotype for drought tolerance”
t0“chickpea”
Claim · model-written summary
M33 was the most drought-susceptible genotype.
- Taxon
- chickpeaCicer arietinumt0
- Material
- M33e0
- Outcome
- susceptible genotype for drought tolerancee0
- Direction
- most susceptiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“M33 was the most susceptible genotype for drought tolerance”
t0“chickpea”