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Pollen and seed yield components of water-stressed cultivated and weedy rice

Water stress occurring during the early phase of the reproductive growth stage may influence plant reproduction success. The objectives of this study were to evaluate the responses of pollen and seed yield components to water stress during anthesis in cultivated rice (Oryza sativa L.) varieties an...

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Main Authors: Puteh, Adam, Jali, Normaliana, Ismail, Mohd Razi, Juraimi, Abdul Shukor, Samsudin, Nuzuliati
Format: Article
Language:English
Published: Universiti Putra Malaysia Press 2009
Online Access:http://psasir.upm.edu.my/id/eprint/4694/1/pollen_and_seed_yield.pdf
http://psasir.upm.edu.my/id/eprint/4694/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2032%20(2)%20Aug.%202009/21%20Pages%20293-303.pdf
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spelling my.upm.eprints.46942015-09-22T03:54:27Z http://psasir.upm.edu.my/id/eprint/4694/ Pollen and seed yield components of water-stressed cultivated and weedy rice Puteh, Adam Jali, Normaliana Ismail, Mohd Razi Juraimi, Abdul Shukor Samsudin, Nuzuliati Water stress occurring during the early phase of the reproductive growth stage may influence plant reproduction success. The objectives of this study were to evaluate the responses of pollen and seed yield components to water stress during anthesis in cultivated rice (Oryza sativa L.) varieties and weedy rice strains. Studies were conducted in 2007 using three cultivated rice varieties; MR 84, MR 219 and MR 232. In 2008 three weedy rice strains were obtained from Seberang Perak, Kuala Pilah and Tanjung Karang areas. Studies were conducted in the field where plants were grown in polybags and submerged in polyethylene tanks. Prior to anthesis, plants were subjected to water stress by taking the plants out of the polyethylene tanks for five days. Flag leaf relative water content (RWC) and relative injury (RI) were measured daily during the stressed period. Pollen production and pollen viability were measured upon re-watering. Seed yield components measured were grain number per panicle, 100-grain weight, percentage filled grain and percentage spikelet sterility at harvest. Water stress caused a 13 – 34% decline in the number of pollen grains per anther in cultivated varieties but increased pollen production in weedy strains. Percentage pollen viability declined by 40 – 45% in MR 219 and MR 232, but increased by 15% in MR 84 when plants were water-stressed. Percent pollen viability in weedy strains never exceeded 52% and significantly declined with water stress. For cultivated varieties, water stress increased total number of grain per panicle by 31%. In weedy strains, only Seberang Perak increased in the number of grain per panicle due to water stress. Spikelet sterility was relatively higher in cultivated varieties (16 – 50%) compared with weedy strains (10 – 23%). The 100-grain weight was not affected by water stress in both cultivated varieties and weedy strains. This study indicated that weedy rice strains would gain a competitive advantage by producing more filled grains when water deficit occurs during anthesis. Universiti Putra Malaysia Press 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/4694/1/pollen_and_seed_yield.pdf Puteh, Adam and Jali, Normaliana and Ismail, Mohd Razi and Juraimi, Abdul Shukor and Samsudin, Nuzuliati (2009) Pollen and seed yield components of water-stressed cultivated and weedy rice. Pertanika Journal of Tropical Agricultural Science, 32 (2). pp. 293-303. ISSN 1511-3701 http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2032%20(2)%20Aug.%202009/21%20Pages%20293-303.pdf
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Water stress occurring during the early phase of the reproductive growth stage may influence plant reproduction success. The objectives of this study were to evaluate the responses of pollen and seed yield components to water stress during anthesis in cultivated rice (Oryza sativa L.) varieties and weedy rice strains. Studies were conducted in 2007 using three cultivated rice varieties; MR 84, MR 219 and MR 232. In 2008 three weedy rice strains were obtained from Seberang Perak, Kuala Pilah and Tanjung Karang areas. Studies were conducted in the field where plants were grown in polybags and submerged in polyethylene tanks. Prior to anthesis, plants were subjected to water stress by taking the plants out of the polyethylene tanks for five days. Flag leaf relative water content (RWC) and relative injury (RI) were measured daily during the stressed period. Pollen production and pollen viability were measured upon re-watering. Seed yield components measured were grain number per panicle, 100-grain weight, percentage filled grain and percentage spikelet sterility at harvest. Water stress caused a 13 – 34% decline in the number of pollen grains per anther in cultivated varieties but increased pollen production in weedy strains. Percentage pollen viability declined by 40 – 45% in MR 219 and MR 232, but increased by 15% in MR 84 when plants were water-stressed. Percent pollen viability in weedy strains never exceeded 52% and significantly declined with water stress. For cultivated varieties, water stress increased total number of grain per panicle by 31%. In weedy strains, only Seberang Perak increased in the number of grain per panicle due to water stress. Spikelet sterility was relatively higher in cultivated varieties (16 – 50%) compared with weedy strains (10 – 23%). The 100-grain weight was not affected by water stress in both cultivated varieties and weedy strains. This study indicated that weedy rice strains would gain a competitive advantage by producing more filled grains when water deficit occurs during anthesis.
format Article
author Puteh, Adam
Jali, Normaliana
Ismail, Mohd Razi
Juraimi, Abdul Shukor
Samsudin, Nuzuliati
spellingShingle Puteh, Adam
Jali, Normaliana
Ismail, Mohd Razi
Juraimi, Abdul Shukor
Samsudin, Nuzuliati
Pollen and seed yield components of water-stressed cultivated and weedy rice
author_facet Puteh, Adam
Jali, Normaliana
Ismail, Mohd Razi
Juraimi, Abdul Shukor
Samsudin, Nuzuliati
author_sort Puteh, Adam
title Pollen and seed yield components of water-stressed cultivated and weedy rice
title_short Pollen and seed yield components of water-stressed cultivated and weedy rice
title_full Pollen and seed yield components of water-stressed cultivated and weedy rice
title_fullStr Pollen and seed yield components of water-stressed cultivated and weedy rice
title_full_unstemmed Pollen and seed yield components of water-stressed cultivated and weedy rice
title_sort pollen and seed yield components of water-stressed cultivated and weedy rice
publisher Universiti Putra Malaysia Press
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/4694/1/pollen_and_seed_yield.pdf
http://psasir.upm.edu.my/id/eprint/4694/
http://www.pertanika.upm.edu.my/Pertanika%20PAPERS/JTAS%20Vol.%2032%20(2)%20Aug.%202009/21%20Pages%20293-303.pdf
_version_ 1643822975204458496
score 13.244745

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