Growth and grain yield of contrasting rice cultivars grown under different conditions of water availability

Jearakongman, Suwat; Rajatasereekul, S.; Naklang, Kunnika; Romyen, Panya; Fukai, S.; Skulkhu, Ekasith; Jumpaket, Baley; Nathabutr, Keson

doi:10.1016/0378-4290(95)00050-x

Cited by 65 publications

(26 citation statements)

References 11 publications

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“…Stronger root signals in IR62266 seem to be associated with more conservative water use 2004) and broader adaptation across rainfed lowland environments (Wade et al, 1999b). This is consistent with the high sensitivity of lowland rice even to partial soil drying, such as transitory disappearance of surface soil water very early in a period of water deficit (Fukai and Cooper, 1995;Jearakongman et al, 1995). Given a need for rice plants in various environments to exploit soil water at depth (e.g., rainfed lowland) or to ignore transient mild water deficit (e.g., aerobic rice), selection for reduced root signals may be effective.…”

Section: Discussionsupporting

confidence: 63%

Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying; Comparison of Two Lines

Siopongco

Sekiya

Yamauchi

et al. 2009

Plant Production Science

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: Previously, we demonstrated that root tips in drying soil communicate with shoots for stomatal closure in rainfed lowland rice, despite further water being available at depth. This study examines variation between two lines in root signals. Rice lines CT9993 and IR62266 were grown in the fi eld, and in the greenhouse with the split-root root-sever wax-layer system, to investigate their responses to mild and severe water defi cit by monitoring stomatal conductance (g s ), leaf water potential and leaf ABA concentration. In the greenhouse, root systems were divided, withholding water from one portion, and in some cases, severing the droughted portion of roots to remove the signal. Wax layers differing in strength were placed at hardpan depth. Roots of CT9993 were better able to penetrate the wax layers. IR62266 exhibited stronger responses than CT9993, with IR62266's stomatal conductance dropping sharply under water defi cit, and recovering at slower rates but less completely, when roots subjected to drying soil were severed. The greater stomatal response in IR62266 was associated with a higher leaf ABA concentration during early water defi cit, which in turn was associated with its greater number of roots in drying soil. In the fi eld, a second reduction in g s was observed under severe water defi cit, with stronger signals in IR62266 associated with more conservative water use as soil drying intensifi ed. To better exploit subsoil water in mild or transient water defi cit, selection for reduced root signals might be warranted.

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Section: Discussionsupporting

confidence: 63%

Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying; Comparison of Two Lines

Siopongco

Sekiya

Yamauchi

et al. 2009

Plant Production Science

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“…Several studies have shown reduced biomass and grain yield as a result of drought (O'Toole, 1982;Jearakongman et al, 1995;Fukai et al, 1999), and largest reductions in yield were observed when drought occurred during the reproductive phase (O'Toole, 1982;Tsuda et al, 1994b;Boonjung and Fukai, 1996;Saxena et al, 1996). Most authors explain this observation with reduced photosynthesis during drought (Fukoshima et al, 1985;Dingkuhn et al, 1989) and/or with drought-induced damage to the developing rice panicles.…”

Section: Discussionmentioning

confidence: 99%

Hydraulic Properties of Rice and the Response of Gas Exchange to Water Stress

2003

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We investigated the role of xylem cavitation, plant hydraulic conductance, and root pressure in the response of rice (Oryza sativa) gas exchange to water stress. In the field (Philippines), the percentage loss of xylem conductivity (PLC) from cavitation exceeded 60% in leaves even in watered controls. The PLC versus leaf water potential relationship indicated diurnal refilling of cavitated xylem. The leaf water potential causing 50 PLC (P 50 ) was Ϫ1.6 MPa and did not differ between upland versus lowland rice varieties. Greenhouse-grown varieties (Utah) were more resistant to cavitation with a 50 PLC of Ϫ1.9 MPa but also showed no difference between varieties. Six-day droughts caused concomitant reductions in leaf-specific photosynthetic rate, leaf diffusive conductance, and soil-leaf hydraulic conductance that were associated with cavitationinducing water potentials and the disappearance of nightly root pressure. The return of root pressure after drought was associated with the complete recovery of leaf diffusive conductance, leaf-specific photosynthetic rate, and soil-leaf hydraulic conductance. Root pressure after the 6-d drought (61.2 Ϯ 8.8 kPa) was stimulated 7-fold compared with well-watered plants before drought (8.5 Ϯ 3.8 kPa). The results indicate: (a) that xylem cavitation plays a major role in the reduction of plant hydraulic conductance during drought, and (b) that rice can readily reverse cavitation, possibly aided by nocturnal root pressure.Upland (aerobically grown) rice (Oryza sativa) and rain-fed lowland (periodically flooded) rice, which combined account for about one-half of the world's rice, are subjected to unpredictable periods of drought (Chaudhary and Rao, 1982). Rice even suffers from water stress when grown in permanently flooded paddies (Ishihara and Saito, 1987;Jiang et al., 1988;Hirasawa et al., 1992 Hirasawa et al., , 1996. Much effort has been put into research that addresses critical yield and productivity constraints in relation to water stress (Wade et al., 1999;Zeigler, 1999). However, progress in the development of drought-resistant cultivars has been slow (Cooper et al., 1999;Fukai et al., 1999). One aspect that has been largely overlooked is the hydraulic conductance of rice and its droughtinduced reduction due to xylem cavitation. Work on woody plants has demonstrated an important hydraulic limitation on stomatal conductance and photosynthesis (Hubbard et al., 2001), a factor that could be equally important for herbaceous crop plants. Recently, Miyamoto et al. (2001) found the hydraulic conductivity of rice roots to be substantially lower than that of other herbaceous roots. This low root conductivity, combined with a relatively high transpiration rate (Tanguilig et al., 1987), could explain the steep drops in leaf water potential and leaf gas exchange found in flooded rice studies. Decreased xylem water potential carries the inherent danger of xylem cavitation, which can substantially reduce the hydraulic conductivity of plants (Tyree et al., 1986;Sperry et al., 1993). R...

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“…The yield is remarkably reduced when standing water in the lowland field disappears before flowering time (Jearakongman et al, 1995). Several studies have shown large genotypic variations in yield response to different water availability in rainfed lowland rice in drought-prone environments (Cooper et al, 1999;Pantuwan et al, 2002).…”

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confidence: 99%

Effects of Soil Clay Content on Water Balance and Productivity in Rainfed Lowland Rice Ecosystem in Northeast Thailand

Tsubo

Fukai

Basnayake

et al. 2007

Plant Production Science

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: Water availability is one of the determinants of productivity of rainfed lowland rice (Oryza sativa L.). Quantifying water losses from a paddy field, such as deep percolation and lateral seepage, assists estimation of water availability to the rice crop and development of appropriate water management in the lowlands. The main objective of this study was to evaluate paddy water availability and productivity across various soils in Northeast Thailand. The daily rate of downward water flow from standing water in the field (D) varied between 0 and 3 mm day -1 from clayey to sandy soils when the standing water was connected to groundwater table. However, when the standing water was separated from groundwater table, D increased up to 5 mm day -1 on soils with very low clay content in the topsoil. Daily net lateral water flow from the field (L) averaged over the season varied between 5 and 24 mm day -1 for the outflow and between 3 and 16 mm day -1 for the inflow. Both the inflow and outflow tended to be associated negatively with the soil clay content. The seasonal water loss through D plus L during the growing season in the lowlands was also negatively related to the soil clay content. The yield of a major rainfed lowland rice cultivar in Northeast Thailand (KDML105) varied from 2 to 4 t ha -1 across the region, and the water productivity (the ratio of grain yield to cumulative rainfall from transplanting/seedling establishment to maturity) ranged from 3 to 9 kg ha -1 mm -1. High clay soils could provide good standing water until late in the growing season, so the high production efficiency was measured on such soils.

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Growth and grain yield of contrasting rice cultivars grown under different conditions of water availability

Cited by 65 publications

References 11 publications

Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying; Comparison of Two Lines

Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying; Comparison of Two Lines

Hydraulic Properties of Rice and the Response of Gas Exchange to Water Stress

Effects of Soil Clay Content on Water Balance and Productivity in Rainfed Lowland Rice Ecosystem in Northeast Thailand

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