نتایج جستجو برای: drought analysis

تعداد نتایج: 2849509  

2010
Liangming LIU Daxiang XIANG Ming LI Liangming Liu Daxiang Xiang

Firstly, the drought monitoring model based on the Cloud Parameters Method/Index (CPI) is briefly introduced in this paper. Meanwhile, the characteristics of the sensor, Spinning Enhanced Visible and InfraRed Imager (SEVIRI), are analyzed from the aspect for drought monitoring. Secondly, we promote a suitable multi-spectral model to detect cloud pixels for the calculation of the three cloud par...

2009
Tian Yu Bruce A. Babcock

An objective drought index that measures the dry and hot conditions adversely affecting crop yields is used in a regression analysis to test whether corn and soybeans have become more drought tolerant. Results indicate that corn yield losses from a drought of a given severity, whether measured in quantity terms or as a percentage of mean yield, have decreased over time. The null hypothesis that...

حسن پاک نیت, , مسعود گلستانی, ,

To investigate genetic variation, and identification of tolerant genotypes according to quantitative indices of drought tolerance, 8 sesame genotypes were tested in a randomized complete block design with three replications under optimum and limited irrigation at the Research Station of College of Agriculture, Shiraz University. Based on the potential yield and yield under stress, quantitative ...

2016
Makoto Saito Heon-Sook Kim Akihiko Ito Tatsuya Yokota Shamil Maksyutov

The Amazon is a significant source of atmospheric methane, but little is known about the source response to increasing drought severity and frequency. We investigated satellite observations of atmospheric column-averaged methane for the 2010 drought and subsequent 2011 wet year in the Amazon using an atmospheric inversion scheme. Our analysis indicates an increase in atmospheric methane over th...

Journal: :Trends in plant science 2006
Roberto Tuberosa Silvio Salvi

The genetic bases of the molecular, cellular and developmental responses to drought involve many gene functions regulated by water availability. Genomics-based approaches provide access to agronomically desirable alleles present at quantitative trait loci (QTLs) that affect such responses, thus enabling us to improve the drought tolerance and yield of crops under water-limited conditions more e...

An Analysis of Drought Researches in Iran Extended Abstract:   Iran is located the spatial geographical position in the south of the temperate region and north of the tropical region between the northern latitudes 40 to 25 degrees north and 65-44 degrees eastern along the seas, oceans and warm and great desert, on the other hand, with complex topography in the Alpine- Himalayas mountain belt ...

2014
Z. Shi

Extremes in climate may severely impact ecosystem structure and function, with both the magnitude and rate of response differing among ecosystem types and processes. We conducted a modeling analysis of the effects of extreme drought on two key ecosystem processes, production and respiration, and, to provide a broader context, we complemented this with a synthesis of published results that cover...

2015
Abirami Ramalingam Himabindu Kudapa Lekha T. Pazhamala Vanika Garg Rajeev K. Varshney

Drought stress has been one of the serious constraints affecting chickpea productivity to a great extent. Genomics-assisted breeding has a potential to accelerate breeding precisely and efficiently. In order to do so, understanding the molecular mechanisms for drought tolerance and identification of candidate genes are crucial. Transcription factors (TFs) have important roles in the regulation ...

2018
Emerson Alves dos Santos Alex-Alan Furtado de Almeida Marcia Christina da Silva Branco Ivanildes Conceição dos Santos Dario Ahnert Virupax C. Baligar Raúl René Valle

Drought is worldwide considered one of the most limiting factors of Theobroma cacao production, which can be intensified by global climate changes. In this study, we aimed to investigate the phenotypic correlation among morphological characteristics of cacao progenies submitted to irrigation and drought conditions and their partitions into direct and indirect effects. Path analysis with phenoty...

Journal: :The Plant cell 2008
Hong Yu Xi Chen Yuan-Yuan Hong Yao Wang Ping Xu Sheng-Dong Ke Hai-Yan Liu Jian-Kang Zhu David J Oliver Cheng-Bin Xiang

Drought is one of the most important environmental constraints limiting plant growth and agricultural productivity. To understand the underlying mechanism of drought tolerance and to identify genes for improving this important trait, we conducted a gain-of-function genetic screen for improved drought tolerance in Arabidopsis thaliana. One mutant with improved drought tolerance was isolated and ...

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