Response of upland rice varieties to drought stress

Mambani, B.; Lal, Rattan

doi:10.1007/bf02197757

Cited by 43 publications

(6 citation statements)

References 6 publications

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“…Selection of Avena sativa seedlings for long or short roots in nutrient solution culture resulted in taller plants in the long-root selection when progenies of the selections were tested in field plots (Barbour & Murphy 1984); similar results have been reported for rice (Mambani & Lal 1983;Ekanayake et al 1985). The extent to which tiller angle and tiller length contributed to these height differences is not known.…”

Section: Discussionsupporting

confidence: 68%

Adventitious root mass distribution in progeny of four perennial ryegrass (Lolium perenneL.) groups selected for root shape

Crush

Nichols

Ouyang

2010

New Zealand Journal of Agricultural Research

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The effects of one cycle of selection for adventitious root system shape (i.e. percentage of total root mass in successive depth increments) were investigated in progeny of four perennial ryegrass pools with contrasting rooting patterns: (1) low surface (0Á10 cm) root mass and roots to 1 m; (2) high surface root mass and roots to 1 m; (3) high root mass 10Á20 cm and roots to 1 m; (4) high surface root mass, shallow rooting. Ten half-sib families were selected from each of the root type progenies, and five seeds from each family were sown and raised as stock plants. Tiller cuttings of each plant were planted into individual 1 m deep root screening tubes of sand and irrigated with nutrient solution After 115 days, the shoots were cut off, the sand/root column cut into 10 cm increments and the roots washed free of sand. The shoots and root samples were ovendried and weighed. The four root shape progeny groups did not differ significantly for shoot or root dry weight (DW), or root/shoot DW ratio. Root type 2 (high surface root mass and roots to 1 m) progeny had a significantly higher percentage of total root mass between 0 and 10 cm than did root type 1 (low surface root mass and roots to 1 m) but none of the other differences were significant for percentage roots 0Á10 cm. The root type 2 progeny had a lower percentage of total root DW between 10 and 20 cm than all the other root types, none of which differed and had a significantly lower percentage of root DW 20Á30 cm than types 1 and 4 but did not differ at this depth from type 3 progeny. The probability of root type 4 (high surface root mass, shallow rooting) plants having roots at 1 m depth was 0.67; this was significantly lower than for the other selections, none of which varied significantly. These results indicate that it should be possible to change root system shape in perennial ryegrass using conventional breeding techniques.

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Section: Discussionsupporting

confidence: 68%

Adventitious root mass distribution in progeny of four perennial ryegrass (Lolium perenneL.) groups selected for root shape

Crush

Nichols

Ouyang

2010

New Zealand Journal of Agricultural Research

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“…Root structure, function, and movement depend on the soil moisture content, and the root density in the subsurface horizon determines the root response to drought stress [64]. For short-statured plants, like rice, wheat, beans, and plants that grow in limited water conditions, a deep root system for acquiring moisture from soil profiles is found to be beneficial [35].…”

Section: Root System Architecture Under Drought Stressmentioning

confidence: 99%

Root Response to Drought Stress in Rice (Oryza sativa L.)

Kim

Chung

Lee

et al. 2020

IJMS

227

139

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The current unpredictable climate changes are causing frequent and severe droughts. Such circumstances emphasize the need to understand the response of plants to drought stress, especially in rice, one of the most important grain crops. Knowledge of the drought stress response components is especially important in plant roots, the major organ for the absorption of water and nutrients from the soil. Thus, this article reviews the root response to drought stress in rice. It is presented to provide readers with information of use for their own research and breeding program for tolerance to drought stress in rice.

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“…Tanguiling et al [28] indicated that leaf elongation rate is a function of dawn leaf water potential (LWP). Notably, LWP tends to be maintained in genotypes with large RLD [29] [30]. Thus, root characteristics are important for leaf expansion under conditions of water stress.…”

Section: Discussionmentioning

confidence: 99%

Adaptability of High-Yielding Rice Cultivars in Relation to Biomass Productivity under Moderately Water Stressed Upland Conditions

Hyoda¹,

Homma²,

Shiraiwa³

et al. 2015

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Recent studies have focused on the improvement of rice productivity under aerobic conditions for times when water resources and food production are limited. This study aimed to evaluate the adaptability of high-yielding rice cultivars to moderately water-stressed upland conditions in order to contribute breeding. A three-year field experiment in the temperate climate of Kyoto, Japan, indicated that the decrease in yield was mainly derived from a decrease in above-ground total dry matter (TDM) rather than a decrease in harvest index (HI). Although the decrease in TDM was mostly caused by a decrease in radiation use efficiency (RUE), we determined that the key to adapting high-yielding cultivars to upland conditions is intercepted radiation per day (IRPD), governed by leaf area index (LAI). Although the effect was not robust, LAI growth under upland conditions was associated with root length density. RUE was dependent on leaf water potential (LWP), indicating that a plant's ability to maintain LWP under water-stressed conditions is important. The results also suggest the necessity of a canopy analyzer to evaluate LAI, as well as an infrared radiation thermometer to evaluate RUE. Performing such measurements during breeding efforts allows us to select for genotypes that are suitable for less stressed aerobic conditions.

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Response of upland rice varieties to drought stress

Cited by 43 publications

References 6 publications

Adventitious root mass distribution in progeny of four perennial ryegrass (Lolium perenneL.) groups selected for root shape

Adventitious root mass distribution in progeny of four perennial ryegrass (Lolium perenneL.) groups selected for root shape

Root Response to Drought Stress in Rice (Oryza sativa L.)

Adaptability of High-Yielding Rice Cultivars in Relation to Biomass Productivity under Moderately Water Stressed Upland Conditions

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