Abstract
【Object】The experiment was conducted to study the physiological effects,grain yield and yield components of Guiliangyou 2 under water stress and re-watering to get water stress threshold value in order to provide reference for its water-saving irrigation cultivation. 【Method】By using pot experiment, CK(normal irrigation, NI) and four water stress treatments viz., T1(micro-slight stress, soil water content accounting for 90%-100% of saturation moisture content), T2(slight stress, 80%-90% of), T3(moderate stress, 70%-80%) and T4(serious stress, 60%-70%), were designed for super rice Guiliangyou 2 at booting and grain filling stages. The physiological indices of leaf were measured after 15 days of water stress and 10 days of re-watering, and grain yield was measured at mature stage. 【Results】As compared with the control, malondialdehyde(MDA), soluble protein, soluble sugar, and chlorophyll relative content(SPAD value) in rice leaves were increased after 15 days of water stresses at booting stage, and all of them were found the highest(7.53 μmol/gFW,36.55 mg/gFW, 11.30 mg/gFW and 39.08) in treatment T4, which significantly increased by 21.84%, 57.00%, 61.20%and 20.36%. The above-mentioned indices were found to be the lowest in T1 treatment. After 10 days of re-watering at booting stage, it found that MDA content of treatment T2, soluble protein and soluble sugar contents of treatment T3 and chlorophyll relative content of T4 treatment had the highest increases by 16.09%, 54.23%, 33.96% and 11.31%. The proline content of leaf in T2 treatment was higher than other treatments after water stress and re-watering at booting stage At grain filling stage, after 15 days of water stress, the MDA and chlorophyll relative content in leaves of different treatments increased firstly and decreased at later along with increasing extent of water stress, and the highest one presented in T2treatment. The soluble protein and sugar contents showed gradual increase and reached the highest in T4 treatment. After10 days of re-watering, MDA, chlorophyll relative content, soluble protein and soluble sugar in leaves presented change trend of increase first and then decrease in different treatments. These indices of T1 treatment were a little higher than the control but lower than the other treatments. With increase extent of water stress, the proline content in leaves decreased constantly. The yield and its component factors of Guiliangyou 2 presented the best in T1 treatment after water stress at boot stageand grain filling stage, respectively, and the yield increased by 18.15% and 10.92% compared with the control,while the other treatments showed worse comprehensive performance than the control. 【Conclusion】The micro-slight water stress can enhance drought resistance of Guiliangyou 2 and get better compensatory effects after re-watering. Guiliangyou 2was more sensitive to water stress at booting stage than grain filling stage.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 20
Claim · model-written summary
At booting, severe water stress increased leaf MDA by 21.84% over control.
- Taxon
- Guiliangyou 2t0
- Organ / stage
- rice leavese0
- Treatment
- T4e0
- Outcome
- malondialdehyde(MDA)e0
- Direction
- increasede0
- Value
- 21.84%e0
- Qualifier
- booting stagee0
Not reportedComparator
Verbatim
e0“malondialdehyde(MDA), soluble protein, soluble sugar, and chlorophyll relative content(SPAD value) in rice leaves were increased after 15 days of water stresses at booting stage, and all of them were found the highest(7.53 μmol/gFW,36.55 mg/gFW, 11.30 mg/gFW and 39.08) in treatment T4, which significantly increased by 21.84%, 57.00%, 61.20%and 20.36%.”
t0“Guiliangyou 2”
Claim · model-written summary
At booting, T4 increased leaf soluble protein by 57.00%.
Not reportedComparator
Verbatim
e0“soluble protein, soluble sugar, and chlorophyll relative content(SPAD value) in rice leaves were increased after 15 days of water stresses at booting stage, and all of them were found the highest(7.53 μmol/gFW,36.55 mg/gFW, 11.30 mg/gFW and 39.08) in treatment T4, which significantly increased by 21.84%, 57.00%, 61.20%and 20.36%.”
t0“Guiliangyou 2”
Claim · model-written summary
At booting, T4 increased leaf soluble sugar by 61.20%.
Not reportedComparator
Verbatim
e0“soluble sugar, and chlorophyll relative content(SPAD value) in rice leaves were increased after 15 days of water stresses at booting stage, and all of them were found the highest(7.53 μmol/gFW,36.55 mg/gFW, 11.30 mg/gFW and 39.08) in treatment T4, which significantly increased by 21.84%, 57.00%, 61.20%and 20.36%.”
t0“Guiliangyou 2”
Claim · model-written summary
At booting, T4 increased SPAD by 20.36%.
- Taxon
- Guiliangyou 2t0
- Treatment
- T4e0
- Outcome
- chlorophyll relative content(SPAD value)e0
- Direction
- increasede0
- Value
- 20.36%e0
Not reportedComparator
Verbatim
e0“chlorophyll relative content(SPAD value) in rice leaves were increased after 15 days of water stresses at booting stage, and all of them were found the highest(7.53 μmol/gFW,36.55 mg/gFW, 11.30 mg/gFW and 39.08) in treatment T4, which significantly increased by 21.84%, 57.00%, 61.20%and 20.36%.”
t0“Guiliangyou 2”
Claim · model-written summary
At booting, T1 gave the lowest measured leaf indices.
Verbatim
t0“Guiliangyou 2”
e0“The above-mentioned indices were found to be the lowest in T1 treatment.”
Claim · model-written summary
After re-watering at booting, T2 had the greatest MDA increase, 16.09%.
Verbatim
t0“Guiliangyou 2”
e0“After 10 days of re-watering at booting stage, it found that MDA content of treatment T2, soluble protein and soluble sugar contents of treatment T3 and chlorophyll relative content of T4 treatment had the highest increases by 16.09%, 54.23%, 33.96% and 11.31%.”
Claim · model-written summary
After re-watering at booting, T3 had the greatest soluble protein increase, 54.23%.
Verbatim
t0“Guiliangyou 2”
e0“After 10 days of re-watering at booting stage, it found that MDA content of treatment T2, soluble protein and soluble sugar contents of treatment T3 and chlorophyll relative content of T4 treatment had the highest increases by 16.09%, 54.23%, 33.96% and 11.31%.”
Claim · model-written summary
After re-watering at booting, T3 had the greatest soluble sugar increase, 33.96%.
Verbatim
t0“Guiliangyou 2”
e0“After 10 days of re-watering at booting stage, it found that MDA content of treatment T2, soluble protein and soluble sugar contents of treatment T3 and chlorophyll relative content of T4 treatment had the highest increases by 16.09%, 54.23%, 33.96% and 11.31%.”
Claim · model-written summary
After re-watering at booting, T4 had the greatest chlorophyll increase, 11.31%.
Verbatim
t0“Guiliangyou 2”
e0“After 10 days of re-watering at booting stage, it found that MDA content of treatment T2, soluble protein and soluble sugar contents of treatment T3 and chlorophyll relative content of T4 treatment had the highest increases by 16.09%, 54.23%, 33.96% and 11.31%.”
Claim · model-written summary
T2 had higher leaf proline than other treatments after booting stress and re-watering.
Verbatim
t0“Guiliangyou 2”
e0“The proline content of leaf in T2 treatment was higher than other treatments after water stress and re-watering at booting stage”
Claim · model-written summary
At grain filling, leaf MDA and chlorophyll first increased then decreased as water stress intensified, peaking at T2.
Verbatim
t0“Guiliangyou 2”
e0“the MDA and chlorophyll relative content in leaves of different treatments increased firstly and decreased at later along with increasing extent of water stress, and the highest one presented in T2treatment.”
Claim · model-written summary
At grain filling, soluble protein and sugar rose with stress and peaked in T4.
Verbatim
t0“Guiliangyou 2”
e0“The soluble protein and sugar contents showed gradual increase and reached the highest in T4 treatment.”
Claim · model-written summary
After re-watering at grain filling, four leaf indices first increased and then decreased across treatments.
Verbatim
t0“Guiliangyou 2”
e0“After10 days of re-watering, MDA, chlorophyll relative content, soluble protein and soluble sugar in leaves presented change trend of increase first and then decrease in different treatments.”
Claim · model-written summary
At grain filling after re-watering, T1 indices were slightly above control and below other treatments.
Verbatim
t0“Guiliangyou 2”
e0“These indices of T1 treatment were a little higher than the control but lower than the other treatments.”
Claim · model-written summary
Leaf proline declined as water stress intensified.
Verbatim
t0“Guiliangyou 2”
e0“With increase extent of water stress, the proline content in leaves decreased constantly.”
Claim · model-written summary
T1 at booting raised yield 18.15% relative to control.
Verbatim
t0“Guiliangyou 2”
e0“The yield and its component factors of Guiliangyou 2 presented the best in T1 treatment after water stress at boot stageand grain filling stage, respectively, and the yield increased by 18.15% and 10.92% compared with the control”
Claim · model-written summary
T1 at grain filling raised yield 10.92% relative to control.
Verbatim
e0“The yield and its component factors of Guiliangyou 2 presented the best in T1 treatment after water stress at boot stageand grain filling stage, respectively, and the yield increased by 18.15% and 10.92% compared with the control”
Claim · model-written summary
Other water stress treatments performed worse overall than control.
Verbatim
t0“Guiliangyou 2”
e0“while the other treatments showed worse comprehensive performance than the control.”
Claim · model-written summary
Micro-slight stress enhanced drought resistance and compensation after re-watering.
Verbatim
e0“The micro-slight water stress can enhance drought resistance of Guiliangyou 2 and get better compensatory effects after re-watering.”
Claim · model-written summary
Guiliangyou 2 was more sensitive to water stress at booting than grain filling.
Verbatim
e0“Guiliangyou 2was more sensitive to water stress at booting stage than grain filling stage.”