Abstract
Soil relative water content and seed plumpness have been shown to be the key factors affecting seed germination and seedling growth of rice under direct drought cropping. It remains to be determined whether seed germination and seedling growth of water-saving and drought-resistant rice (WDR) and conventional rice with the same proportion of rice seed have the same response to soil moisture changes. The purpose of this study was to investigate the seed germination and physiological characteristics of the rice cultivars Guangliangyou 1813 (GLY-1813,indica hybrid rice) and Hanyou 73 ((HY-73), WDR) with four different specific gravities (T1, T2, T3, and T4; the rice seeds were divided into four specific gravity levels by weight using saline water, the representative specific gravities were <1.0, 1.0–1.1, 1.1–1.2 and >1.2 kg m−3, respectively), at five soil moisture content gradients (soil relative water contents of 10–20%, 20–40%, 40–60%, 60–80%, and 80–100%), under dry direct seeding conditions. The results showed that GLY-1813 had a higher germination potential, germination and seedling emergence rates, greater root dry weight, seedling dry weight, root oxidation activity, and chlorophyll content, and lower malondialdehyde (MDA) content when the soil relative water content was 20–40% or 40–60%. Cultivar HY-73 had the highest germination rate and seedling physiological activity at 20–40% relative water content; its growth vigor was better than that of GLY-1813 at the same soil moisture level. In conclusion, the soil relative water content for seed germination of HY-73 was 20–40%, which was less than that of GLY-1813. When soil relative water content was sufficient for seed germination and growth, the higher the plumpness of the rice seed, the easier it was to resist the negative effects of an adverse growth environment.
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Claims 8
Claim · model-written summary
GLY-1813 had higher germination potential, germination rate and seedling emergence rate at 20-40% or 40-60% soil relative water content.
- Taxon
- rice
Oryza sativae0 - Material
- GLY-1813e1
- Treatment
- soil relative water contente2
- Outcome
- germination potential, germination and seedling emergence ratese1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e1“GLY-1813 had a higher germination potential, germination and seedling emergence rates”
e2“when the soil relative water content was 20–40% or 40–60%”
Claim · model-written summary
GLY-1813 had greater root dry weight and seedling dry weight at 20-40% or 40-60% soil relative water content.
- Taxon
- riceOryza sativae0
- Material
- GLY-1813e1
- Treatment
- soil relative water contente2
- Outcome
- root dry weight, seedling dry weighte3
- Direction
- greatere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e1“GLY-1813 had a higher germination potential, germination and seedling emergence rates”
e3“greater root dry weight, seedling dry weight”
e2“when the soil relative water content was 20–40% or 40–60%”
Claim · model-written summary
GLY-1813 had greater root oxidation activity and chlorophyll content at 20-40% or 40-60% soil relative water content.
- Taxon
- riceOryza sativae0
- Material
- GLY-1813e1
- Treatment
- soil relative water contente2
- Outcome
- root oxidation activity, and chlorophyll contente4
- Direction
- greatere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e1“GLY-1813 had a higher germination potential, germination and seedling emergence rates”
e4“greater root dry weight, seedling dry weight, root oxidation activity, and chlorophyll content”
e2“when the soil relative water content was 20–40% or 40–60%”
Claim · model-written summary
GLY-1813 had lower malondialdehyde content at 20-40% or 40-60% soil relative water content.
- Taxon
- riceOryza sativae0
- Material
- GLY-1813e1
- Treatment
- soil relative water contente5
- Outcome
- malondialdehyde (MDA) contente5
- Direction
- lowere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e1“GLY-1813 had a higher germination potential, germination and seedling emergence rates”
e5“lower malondialdehyde (MDA) content when the soil relative water content was 20–40% or 40–60%”
Claim · model-written summary
HY-73 had the highest germination rate and seedling physiological activity at 20-40% relative water content.
- Taxon
- riceOryza sativae0
- Material
- HY-73e6
- Treatment
- 20–40% relative water contente6
- Outcome
- germination rate and seedling physiological activitye6
- Direction
- higheste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e6“Cultivar HY-73 had the highest germination rate and seedling physiological activity at 20–40% relative water content”
Claim · model-written summary
HY-73 growth vigor was better than that of GLY-1813 at the same soil moisture level.
- Taxon
- riceOryza sativae0
- Treatment
- same soil moisture levele7
- Outcome
- growth vigore7
- Direction
- bettere7
- Comparator
- GLY-1813e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e7“its growth vigor was better than that of GLY-1813 at the same soil moisture level”
Claim · model-written summary
HY-73 required a lower soil relative water content (20-40%) for seed germination than GLY-1813.
- Taxon
- riceOryza sativae0
- Material
- HY-73e1
- Outcome
- soil relative water content for seed germinatione1
- Direction
- lesse1
- Value
- 20–40%e1
- Comparator
- GLY-1813e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e1“the soil relative water content for seed germination of HY-73 was 20–40%, which was less than that of GLY-1813”
Claim · model-written summary
Higher seed plumpness made rice seeds easier to resist negative effects of an adverse growth environment when soil moisture was sufficient.
- Taxon
- riceOryza sativae0
- Treatment
- plumpnesse1
- Outcome
- resist the negative effects of an adverse growth environmente1
- Direction
- easiere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination and seedling growth of rice under direct drought cropping”
e1“When soil relative water content was sufficient for seed germination and growth, the higher the plumpness of the rice seed, the easier it was to resist the negative effects of an adverse growth environment”
The same questions in other papers
soil water · growth · Oryza sativa (rice)Positive and negative results
20 papers in the same direction as this paper · 18 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
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See all 40 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.