Abstract
Abstract Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally, but studies addressing both physiological and proteomic responses that how cassava crops can adjust their growth and metabolism under drought conditions are lacking. Combining leaf physiological and proteomic characteristics strongly allied with drought tolerance should results in enhanced drought tolerance in cassava crop. Therefore, the aims of this study were to explore the plant physiological and proteomic mechanisms involved in drought adaptation in cassava. Xinxuan 048 (XX048) was exposed to well-watered control (CK, relative soil water content (RSWC) as 80 ± 5%), mild drought stress (LD, RSWC as 65 ± 5%), moderate drought stress (MD, RSWC as 50 ± 5%) and severe drought stress (SD, RSWC as 35 ± 5%) from 30 days after planting. Under drought stress conditions, cassava plant showed a substantial decline in plant height, stem diameter, leaf number, leaf water content, the ratio of free water content to bound water content of leaf (FW/BW), net photosynthetic rate ( Pn ), intercellular CO 2 concentration ( Ci ), stomatal conductance ( Gs ) and transpiration rate ( Tr ) compared with well watered plants. However, compared with control, leaf water content, SPAD value, cell membrane permeability, malondialdehyde (MDA), soluble sugar, protein proline content SOD and CAT activity were at peak under drought stress. The proteomic analysis revealed that among 3 339 identified proteins, drought stress increased and decreased abundance of 262 and 296 proteins, respectively, compared with control condition. These proteins were involved in carbohydrate energy metabolism, protein homeostasis, transcription, cell structure, cell membrane transport, signal transduction, stress and defense responses. These data not only provides a comprehensive dataset on overall proteomic changes in cassava leaves under drought stress, but also highlights the mechanisms by which euphorbiaceae plants can adapt to drought conditions.
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Claims 13
Claim · model-written summary
Under drought stress, cassava plant height, stem diameter and leaf number declined compared with well-watered plants.
- Taxon
- cassava
Manihot esculentae1 - Material
- Xinxuan 048 (XX048)e2
- Treatment
- drought stresse3
- Outcome
- plant height, stem diameter, leaf numbere3
- Direction
- declinee3
- Comparator
- well watered plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e2“Xinxuan 048 (XX048) was exposed to well-watered control (CK, relative soil water content (RSWC) as 80 ± 5%), mild drought stress (LD, RSWC as 65 ± 5%), moderate drought stress (MD, RSWC as 50 ± 5%) and severe drought stress (SD, RSWC as 35 ± 5%) from 30 days after planting”
e3“Under drought stress conditions, cassava plant showed a substantial decline in plant height, stem diameter, leaf number, leaf water content, the ratio of free water content to bound water content of leaf (FW/BW), net photosynthetic rate ( Pn ), intercellular CO 2 concentration ( Ci ), stomatal conductance ( Gs ) and transpiration rate ( Tr ) compared with well watered plants”
Claim · model-written summary
Under drought stress, leaf water content and the ratio of free to bound water content of leaf (FW/BW) declined compared with well-watered plants.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse3
- Outcome
- leaf water content, the ratio of free water content to bound water content of leaf (FW/BW)e3
- Direction
- declinee3
- Comparator
- well watered plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e3“Under drought stress conditions, cassava plant showed a substantial decline in plant height, stem diameter, leaf number, leaf water content, the ratio of free water content to bound water content of leaf (FW/BW), net photosynthetic rate ( Pn ), intercellular CO 2 concentration ( Ci ), stomatal conductance ( Gs ) and transpiration rate ( Tr ) compared with well watered plants”
Claim · model-written summary
Under drought stress, net photosynthetic rate, intercellular CO2 concentration and stomatal conductance declined compared with well-watered plants.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse3
- Outcome
- net photosynthetic rate (Pn), intercellular CO 2 concentration (Ci), stomatal conductance (Gs)e3
- Direction
- declinee3
- Comparator
- well watered plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e3“Under drought stress conditions, cassava plant showed a substantial decline in plant height, stem diameter, leaf number, leaf water content, the ratio of free water content to bound water content of leaf (FW/BW), net photosynthetic rate ( Pn ), intercellular CO 2 concentration ( Ci ), stomatal conductance ( Gs ) and transpiration rate ( Tr ) compared with well watered plants”
Claim · model-written summary
Under drought stress, transpiration rate declined compared with well-watered plants.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse3
- Outcome
- transpiration rate (Tr)e3
- Direction
- declinee3
- Comparator
- well watered plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e3“Under drought stress conditions, cassava plant showed a substantial decline in plant height, stem diameter, leaf number, leaf water content, the ratio of free water content to bound water content of leaf (FW/BW), net photosynthetic rate ( Pn ), intercellular CO 2 concentration ( Ci ), stomatal conductance ( Gs ) and transpiration rate ( Tr ) compared with well watered plants”
Claim · model-written summary
Under drought stress, leaf water content, SPAD value and cell membrane permeability were at peak compared with control.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse4
- Outcome
- leaf water content, SPAD value, cell membrane permeabilitye4
- Direction
- at peake4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e4“compared with control, leaf water content, SPAD value, cell membrane permeability, malondialdehyde (MDA), soluble sugar, protein proline content SOD and CAT activity were at peak under drought stress”
Claim · model-written summary
Under drought stress, malondialdehyde (MDA) and soluble sugar were at peak compared with control.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse4
- Outcome
- malondialdehyde (MDA), soluble sugare4
- Direction
- at peake4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e4“compared with control, leaf water content, SPAD value, cell membrane permeability, malondialdehyde (MDA), soluble sugar, protein proline content SOD and CAT activity were at peak under drought stress”
Claim · model-written summary
Under drought stress, protein proline content, SOD and CAT activity were at peak compared with control.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse4
- Outcome
- protein proline content SOD and CAT activitye4
- Direction
- at peake4
- Comparator
- controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e4“compared with control, leaf water content, SPAD value, cell membrane permeability, malondialdehyde (MDA), soluble sugar, protein proline content SOD and CAT activity were at peak under drought stress”
Claim · model-written summary
Drought stress increased the abundance of 262 proteins in cassava leaves compared with control.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse5
- Outcome
- proteinse5
- Direction
- increasede5
- Value
- 262e5
- Comparator
- control conditione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e5“drought stress increased and decreased abundance of 262 and 296 proteins, respectively, compared with control condition”
Claim · model-written summary
Drought stress decreased the abundance of 296 proteins in cassava leaves compared with control.
- Taxon
- cassavaManihot esculentae1
- Treatment
- drought stresse5
- Outcome
- proteinse5
- Direction
- decreasede5
- Value
- 296e5
- Comparator
- control conditione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e5“drought stress increased and decreased abundance of 262 and 296 proteins, respectively, compared with control condition”
Claim · model-written summary
The drought-changed proteins were involved in carbohydrate energy metabolism, protein homeostasis and transcription.
- Taxon
- cassavaManihot esculentae1
- Outcome
- carbohydrate energy metabolism, protein homeostasis, transcriptione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e6“These proteins were involved in carbohydrate energy metabolism, protein homeostasis, transcription, cell structure, cell membrane transport, signal transduction, stress and defense responses”
Claim · model-written summary
The drought-changed proteins were involved in cell structure, cell membrane transport and signal transduction.
- Taxon
- cassavaManihot esculentae1
- Outcome
- cell structure, cell membrane transport, signal transductione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e6“These proteins were involved in carbohydrate energy metabolism, protein homeostasis, transcription, cell structure, cell membrane transport, signal transduction, stress and defense responses”
Claim · model-written summary
The drought-changed proteins were involved in stress and defense responses.
- Taxon
- cassavaManihot esculentae1
- Outcome
- stress and defense responsese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e6“These proteins were involved in carbohydrate energy metabolism, protein homeostasis, transcription, cell structure, cell membrane transport, signal transduction, stress and defense responses”
Claim · model-written summary
The authors suggest the proteomic changes reveal how Euphorbiaceae plants such as cassava adapt to drought.
- Taxon
- cassavaManihot esculentae1
- Outcome
- adapt to drought conditionse7
- Qualifier
- mechanisms by which euphorbiaceae plants can adapt to drought conditionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Drought stress is one of the potent abiotic stress limiting cassava ( Manihot esculenta ) yield globally”
e7“highlights the mechanisms by which euphorbiaceae plants can adapt to drought conditions”
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