Abstract
Abstract Sorghum is an important forage crop, and both quantity and quality of this crop are affected by drought stress. Accordingly, in order to investigate the effect of drought stress on quantity and quality of morpho-physiological traits, a split-plot experiment was conducted based on randomized complete block design with four replicates in Isfahan, Iran, during 2017 and 2018 crop seasons. Treatments were irrigation regimes with four levels (control, preventing irrigation at pollination, seed milky, and seed doughy stages) and three varieties of sorghum (Sepideh, Kimia, and Payam). The results showed that drought stress negatively influenced morphological and yield-related traits of sorghum, while its effect was positive on some quality-related traits such as total soluble carbohydrate, crude protein, and proline contents. According to the results, drought stress based on prevention of irrigation at doughy stage (representing moderate drought stress) caused inconsiderable reduction in sorghum yield. In addition, drought stress has effect on relationships between morpho-physiological traits in sorghum. Considering morphological and yield-related traits together with susceptibility (stress susceptibility index) and tolerance (geometric mean product) indices indicated that Payam variety is more proper to be used in both drought stress and non-stress conditions. Furthermore, both Kimia and Payam varieties were shown to be suitable varieties based on quality-related traits, but because of having low NDF Payam variety might be more suitable.
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Claims 7
Claim · model-written summary
Drought reduced sorghum morphological and yield traits.
- Treatment
- drought stresse0
- Outcome
- morphological and yield-related traitse0
- Direction
- negatively influencede0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress negatively influenced morphological and yield-related traits of sorghum”
Claim · model-written summary
Drought increased soluble carbohydrate, crude protein, and proline contents.
Not reportedTaxonTreatmentComparator
Verbatim
e0“its effect was positive on some quality-related traits such as total soluble carbohydrate, crude protein, and proline contents.”
Claim · model-written summary
Irrigation cessation at the doughy stage caused little sorghum yield reduction.
- Treatment
- prevention of irrigation at doughy stagee0
- Outcome
- yielde0
- Direction
- inconsiderable reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress based on prevention of irrigation at doughy stage (representing moderate drought stress) caused inconsiderable reduction in sorghum yield.”
Claim · model-written summary
Drought altered relationships among sorghum morphophysiological traits.
- Treatment
- drought stresse0
- Outcome
- relationships between morpho-physiological traitse0
- Direction
- effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought stress has effect on relationships between morpho-physiological traits in sorghum.”
Claim · model-written summary
Payam was judged more suitable under drought and non-stress conditions.
Verbatim
e0“Payam variety is more proper to be used in both drought stress and non-stress conditions.”
Claim · model-written summary
Kimia and Payam were suitable based on quality traits.
Verbatim
e0“both Kimia and Payam varieties were shown to be suitable varieties based on quality-related traits”
Claim · model-written summary
Payam may be more suitable because of low NDF.
Verbatim
e0“because of having low NDF Payam variety might be more suitable.”
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