scholarly journals MORPHOLOGICAL AND PHYSIOLOGICAL TRAITS OF UPLAND RICE CULTIVARS AFFECTED BY WATER DEFICIT

2019 ◽  
Vol 12 (6) ◽  
pp. 3058-3068
Author(s):  
Cleber Morais Guimarães ◽  
Luís Fernando Stone ◽  
Pedro Marques da Silveira
Keyword(s):  
Water Deficit ◽  
Upland Rice ◽  
Physiological Traits ◽  
Rice Cultivars ◽  
Morphological And Physiological Traits

scholarly journals Evaluation of physiological traits in upland rice for adaptation to no-tillage system

2009 ◽  
Vol 21 (2) ◽  
pp. 113-122 ◽  
Author(s):  
Alexandre B. Heinemann ◽  
Luís Fernando Stone ◽  
Nand K. Fageria ◽  
Lucas M. de Castro
Keyword(s):  
Leaf Area ◽  
Crop Production ◽  
Dry Matter ◽  
Upland Rice ◽  
Management Practice ◽  
Physiological Traits ◽  
No Tillage ◽  
Rice Cultivars ◽  
Tillage System ◽  
Early Vigor

In the cerrado region of Brazil, no-tillage is an alternative management practice to conserve soil and reduce cost of crop production. However, many studies have been showed that there is a decrease in the yield when upland rice is cropped in this system. Therefore, there is a need that new breeding initiatives introgress favorable traits into upland rice for no-tillage adaptation. Key traits include faster emergence, ability to germinate when deep seeded, faster root development, and early canopy closure during the vegetative stages. All those traits can be summarized as "early vigor". So, the objective of this study was to evaluate physiological traits of four contrasting parental upland rice cultivars to verify their adaptation to no-tillage system. A greenhouse experiment with four upland rice cultivars (BRS Primavera, BRS Curinga, BRS Soberana, and Douradão) were planted at three different dates and growth at potential conditions. Development stages, total dry matter, leaf area, leaf dry matter, leaf length, leaf elongation rate and leaf duration were measured and calculated. Based on physiological traits, the four cultivars showed differences in the growth cycle. However, for biomass and leaf area growth and leaf expansion traits they did not differ significantly, probably being the lack of genetic "early vigor" a characteristic of the modern cultivars. The growth and development pattern was significantly affected by planting dates and not by cultivars.

scholarly journals Characterization of the morphological and physiological traits of rice cultivars with adaptation to unflooded condition during early vegetative growth

2016 ◽  
Vol 19 (1) ◽  
pp. 173-180 ◽  
Author(s):  
Maya Matsunami ◽  
Toshinori Matsunami ◽  
Ikuko Kodama ◽  
Atsushi Ogawa ◽  
Kyoko Toyofuku ◽  
...  
Keyword(s):  
Vegetative Growth ◽  
Physiological Traits ◽  
Rice Cultivars ◽  
Morphological And Physiological Traits

scholarly journals Morphological and physiological traits of seeds and seedlings in two rice cultivars with contrasting early vigor

2016 ◽  
Vol 20 (1) ◽  
pp. 95-101 ◽  
Author(s):  
Min Huang ◽  
Ruichun Zhang ◽  
Jiana Chen ◽  
Fangbo Cao ◽  
Ligeng Jiang ◽  
...  
Keyword(s):  
Physiological Traits ◽  
Rice Cultivars ◽  
Morphological And Physiological Traits ◽  
Early Vigor

scholarly journals Transpiration rate response to water deficit during vegetative and reproductive phases of upland rice cultivars

2011 ◽  
Vol 68 (1) ◽  
pp. 24-30 ◽  
Author(s):  
Alexandre Bryan Heinemann ◽  
Luís Fernando Stone ◽  
Nand Kumar Fageria
Keyword(s):  
Water Stress ◽  
Soil Water ◽  
Water Deficit ◽  
Transpiration Rate ◽  
Root Zone ◽  
Rice Yield ◽  
Upland Rice ◽  
Growth Stages ◽  
Rice Cultivars ◽  
Potential Yield

Water deficit is one of the most important abiotic stress limiting upland rice yield in the "Cerrado" region of Brazil. Selecting drought tolerant cultivars is an important strategy to overcome this constraint. Two greenhouse experiments were conducted at Santo Antônio de Goiás, state of Goiás, Brazil, to compare the response of normalized transpiration rate (NTR) of three modern (BRS Primavera, BRSMG Curinga and BRS Soberana) and one traditional (Douradão) upland rice cultivars to soil water deficit during the vegetative and reproductive growth stages. This information will support breeding strategies to improve rice yield in a drought-prone target population environments (TPE) in Brazil. NTR and the total fraction of transpirable soil water (FTSW) were calculated, plotted and adjusted according to a sigmoid non-linear model. The p factor, defined as the fraction of available soil water that can be removed from the root zone before water deficit occurs, was calculated by assuming that it occurs when NTR is equal to 0.95. Modern cultivars had a higher value of p for the reproductive phase than for the vegetative phase. In addition, these cultivars are better adapted to express their potential yield in regions with low intensity and occurrence of water stress and the traditional cultivar is enable to better support adverse conditions of water stress. It can be concluded that there is need to precisely characterize drought patterns in TPEs. This information can focus the breeding program to improve drought tolerance in modern upland rice cultivars.

Morphological and Physiological Traits of Root in Different Drought Resistant Peanut Cultivars

2014 ◽  
Vol 40 (3) ◽  
pp. 531 ◽  
Author(s):  
Guang-Hui LI ◽  
Yong-Shan WAN ◽  
Feng-Zhen LIU ◽  
Kun ZHANG
Keyword(s):  
Physiological Traits ◽  
Morphological And Physiological Traits ◽  
Peanut Cultivars ◽  
Drought Resistant
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