Climate change in Thailand and its potential impact on rice yield

Bachelet, Dominique; Brown, Douglas R.; Böhm, Margi; Russell, Periann

doi:10.1007/bf00141376

Cited by 20 publications

(9 citation statements)

References 19 publications

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“…This is probably being one of the reasons why the plant tubers derived from different collection sites also varied in estrogenic activity. A possible explanation for this may be that the forest type and climate of the Central-West region may critical for plant growth [35]. This conclusion could be more precise if the differences in plant genetics are clarified because both genetics a n d e n v i r o n m e n t , e s p e c i a l l y g e o g r a p h i c distribution, could influence the isoflavone contents of plant materials [36].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Estrogenic Activity of the Wild Pueraria mirifica by Vaginal Cornification Assay

Cherdshewasart

Kitsamai

Malaivijitnond

2007

Journal of Reproduction and Development

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Abstract. The aim of this study was to evaluate the estrogenic activity of tuberous samples of phytoestrogen-rich Pueraria mirifica collected from 25 of 76 provinces in Thailand by vaginal cornification assay. Tuberous powders were prepared and administered to ovariectomized rats for 14 consecutive days at dosages of 10, 100 and 1,000 mg/kg BW respectively, and were compared with a daily treatment with 2 mg/kg BW 17β-estradiol (E2). Rats treated with 10 mg/kg BW Pueraria mirifica showed no vaginal cornification. Treatment with 100 mg/kg BW Pueraria mirifica from 13 out of 25 plant samples resulted in development of vaginal cornification. The cell count percentages of the vaginal smeared cells for the treatment with the 2 plant samples that exhibited the fastest vaginal cornification revealed large variation in their estrogenic activities. Treatment with 1,000 mg/kg BW Pueraria mirifica from all plant samples produced vaginal cornification with the mean value for the period (day) of first appearance of cornified cells being 4.08 days compared to 2 days with 2 mg/kg BW E2. The overall appearance period (day) of cornified cells during the treatment and post-treatment period with 1,000 mg/kg BW per day Pueraria mirifica was shorter than treatment with 2 mg/kg BW E2. The results demonstrate that the plant population shows differential estrogenic activity as evaluated by vaginal cornification assay. , and isoflavones [5][6][7][8][9][10]. The estrogenic activity of miroestrol was first determined in ovariectomized rats. Administration of miroestrol produces a mammogenic effect in rats [11]. Using the vaginal cornification assay, miroestrol was estimated to have 0.25 times the estrogenic activity of 17β-estradiol [12]. Thus, various types of research have been conducted on the estrogenic effects of P. mirifica, especially in recent years. Crude P. mirifica powder can relief the climacteric symptoms of post-menopausal women [13]. The estrogenic activities of P. mirifica powder and extract has been evaluated in various species of experimental animals and found to have no toxicity [14]. P. mirifica has biphasic effects on MCF-7 cell proliferation, both suppression and stimulation [15], and an anti-proliferation effect on HeLa cells (ERα-negative human cervical adenocarcinoma cells) [16]. Considering the effects on the reproductive organs and reproductive-related hormones, P. mirifica suppresses luteinizing

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Section: Discussionmentioning

confidence: 99%

Evaluation of the Estrogenic Activity of the Wild Pueraria mirifica by Vaginal Cornification Assay

Cherdshewasart

Kitsamai

Malaivijitnond

2007

Journal of Reproduction and Development

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“…The basin is in a tropical climate, and is influenced by northeast and southwest monsoons. The northeast monsoon brings in cool and dry air from November to February, whereas the southwest monsoon brings very humid air, thus causing heavy rains from May to October [38]. …”

Section: Site Descriptionmentioning

confidence: 99%

Assessment on Hydrologic Response by Climate Change in the Chao Phraya River Basin, Thailand

Ligaray

Kim²,

Sthiannopkao

et al. 2015

Water

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Abstract:The Chao Phraya River in Thailand has been greatly affected by climate change and the occurrence of extreme flood events, hindering its economic development. This study assessed the hydrological responses of the Chao Phraya River basin under several climate sensitivity and greenhouse gas emission scenarios. The Soil and Water Assessment Tool (SWAT) model was applied to simulate the streamflow using meteorological and observed data over a nine-year period from 2003 to 2011. The SWAT model produced an acceptable performance for calibration and validation, yielding Nash-Sutcliffe efficiency (NSE) values greater than 0.5. Precipitation scenarios yielded streamflow variations that corresponded to the change of rainfall intensity and amount of rainfall, while scenarios with increased air temperatures predicted future water shortages. High CO2 concentration scenarios incorporated plant responses that led to a dramatic increase in streamflow. The greenhouse gas emission scenarios increased the streamflow variations to 6.8%, 41.9%, and 38.4% from the reference period (2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011). This study also provided a framework upon which the peak flow can be managed to control the nonpoint sources during wet season. We hope that the future climate scenarios presented in this study could provide predictive information for the river basin.

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“…The Mae Klong River basin covers a total area of 30,800 km 2 in the west central of Thailand with the very flat delta. It is periodically flooded in rainy season (mostly during August to November) [21]. The most important farming activities in this region are rice paddies and orchards including coconut, lime, lychee and mango.…”

Section: The Study Areamentioning

confidence: 99%