Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils
Stay-green in the post-anthesis period is thought to be an efficient drought-tolerance trait in crops, but its effectiveness in rice (Oryza sativa L.) is unknown. Our objectives were to determine whether the stay-green trait exists in rice cultivars in drought-prone areas. Twenty-four cultivars from...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Taylor & Francis Group
2009-01-01
|
Series: | Plant Production Science |
Subjects: | |
Online Access: | http://dx.doi.org/10.1626/pps.12.397 |
id |
doaj-8dafd025458d4099bd6ebb6ca07029d3 |
---|---|
record_format |
Article |
spelling |
doaj-8dafd025458d4099bd6ebb6ca07029d32020-11-24T21:56:56ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082009-01-0112439740810.1626/pps.12.39711644983Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated SoilsTien Ba Hoang0Tohru Kobata1Faculty of Life and Environmental Science, Shimane UniversityFaculty of Life and Environmental Science, Shimane UniversityStay-green in the post-anthesis period is thought to be an efficient drought-tolerance trait in crops, but its effectiveness in rice (Oryza sativa L.) is unknown. Our objectives were to determine whether the stay-green trait exists in rice cultivars in drought-prone areas. Twenty-four cultivars from Japan and Vietnam were grown in pots of 0.08 m in diameter and 1.00 m deep. At heading, irrigation was terminated in half of the pots and continued in the remaining pots. Every four days during the grain-filling period, we measured the leaf green color with a chlorophyll meter (SPAD), the green leaf area (GLA) and the fraction of transpirable soil water (FTSW). The capacity for maintenance of SPAD-value and GLA in desiccated soils was evaluated by determining the ratio of integrated SPAD-value and GLA in desiccated (D) plants to those in irrigated (I) plants (SPADd/I or GLAd/I, respectively). The SPADd/I and GLAd/I in 24 cultivars showed diverse frequency distributions. Cultivars belonging to higher ranges of the distribution in SPADd/I and GLAd/I tended to show higher ratios of plant dry weight at harvest in D to in I plants. SPADd/I and GLAd/I in the grain-filling period were poorly correlated with those in the seedling period in desiccated soils, and hence the capacity for maintenance of green leaves in the grain-filling period would differ from that in the seedling period. These results suggest that the stay-green trait exists as the capacity for maintaining green leaves and benefits dry matter production in desiccated soils in rice cultivars in drought-prone areas.http://dx.doi.org/10.1626/pps.12.397DroughtGrain-filling periodRiceSeedling periodStay-green |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tien Ba Hoang Tohru Kobata |
spellingShingle |
Tien Ba Hoang Tohru Kobata Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils Plant Production Science Drought Grain-filling period Rice Seedling period Stay-green |
author_facet |
Tien Ba Hoang Tohru Kobata |
author_sort |
Tien Ba Hoang |
title |
Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils |
title_short |
Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils |
title_full |
Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils |
title_fullStr |
Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils |
title_full_unstemmed |
Stay-Green in Rice (Oryza sativa L.) of Drought-Prone Areas in Desiccated Soils |
title_sort |
stay-green in rice (oryza sativa l.) of drought-prone areas in desiccated soils |
publisher |
Taylor & Francis Group |
series |
Plant Production Science |
issn |
1343-943X 1349-1008 |
publishDate |
2009-01-01 |
description |
Stay-green in the post-anthesis period is thought to be an efficient drought-tolerance trait in crops, but its effectiveness in rice (Oryza sativa L.) is unknown. Our objectives were to determine whether the stay-green trait exists in rice cultivars in drought-prone areas. Twenty-four cultivars from Japan and Vietnam were grown in pots of 0.08 m in diameter and 1.00 m deep. At heading, irrigation was terminated in half of the pots and continued in the remaining pots. Every four days during the grain-filling period, we measured the leaf green color with a chlorophyll meter (SPAD), the green leaf area (GLA) and the fraction of transpirable soil water (FTSW). The capacity for maintenance of SPAD-value and GLA in desiccated soils was evaluated by determining the ratio of integrated SPAD-value and GLA in desiccated (D) plants to those in irrigated (I) plants (SPADd/I or GLAd/I, respectively). The SPADd/I and GLAd/I in 24 cultivars showed diverse frequency distributions. Cultivars belonging to higher ranges of the distribution in SPADd/I and GLAd/I tended to show higher ratios of plant dry weight at harvest in D to in I plants. SPADd/I and GLAd/I in the grain-filling period were poorly correlated with those in the seedling period in desiccated soils, and hence the capacity for maintenance of green leaves in the grain-filling period would differ from that in the seedling period. These results suggest that the stay-green trait exists as the capacity for maintaining green leaves and benefits dry matter production in desiccated soils in rice cultivars in drought-prone areas. |
topic |
Drought Grain-filling period Rice Seedling period Stay-green |
url |
http://dx.doi.org/10.1626/pps.12.397 |
work_keys_str_mv |
AT tienbahoang staygreeninriceoryzasativalofdroughtproneareasindesiccatedsoils AT tohrukobata staygreeninriceoryzasativalofdroughtproneareasindesiccatedsoils |
_version_ |
1725856285135470592 |