Responses of seven diverse rice cultivars to water deficits I. Stress development, canopy temperature, leaf rolling and growth

Neil C. Turner, John C. O'Toole, R. T. Cruz, O. S. Namuco, Sayeed Ahmad

Research output: Contribution to journalArticle

95 Citations (Scopus)

Abstract

Predawn and midday leaf water potentials and leaf osmotic potentials, soil water potentials, canopy temperatures, leaf rolling, light interception, dry matter production and water use were followed in seven rice (Oryza sativa L.) cultivars before, during and after the imposition for 10 days of different irrigation treatments by a line source sprinkler system imposed prior to flowering. The seven rice cultivars, Azucena, Tachiminori, IAC 25, IRAT 13, BPI 76, IR 20 and IR 36, represented a wide range of germplasm from traditional dryland to improved wetland types. As soil water potentials in the upper 30 cm of the soil decreased, canopy-to-air temperature differences increased, leaf rolling increased and dry matter production decreased. The wetland cultivars IR 20 and IR 36 had a greater diurnal change in leaf water potential between predawn and midday than the dryland cultivars. Canopy-to-air temperature differences and leaf rolling scores also varied among cultivars. Leaves of the dryland cultivars, particularly Azucena and IAC 25, rolled and had higher canopy-to-air temperature differences at higher waterpotetials and higher turgor pressures than the wetland cultivars IR 20 and IR 36. No differences among cultivars were observed in either the rates of dry during the period of differential irrigation. The stress treatments imposed in the pre-flowering period delayed panicle emergence by 10 days in IAC 25 which was at the boot stage of development, when stress was most severe, and by 4 to 5 days in all other cultivars, some of which emerged up to 30 days after full irrigation had been restored. The results suggest that the physiological differences observed among cultivars, particularly between wetland and dryland types, had little effect on growth and water and water use during a short period of water deficit.

Original languageEnglish
Pages (from-to)257-271
Number of pages15
JournalField Crops Research
Volume13
Issue numberC
DOIs
Publication statusPublished - 1986
Externally publishedYes

Fingerprint

leaf rolling
cultivar
rice
canopy
cultivars
temperature
arid lands
water
wetlands
wetland
air temperature
soil water potential
irrigation
leaf water potential
dry matter accumulation
flowering
water use
dry matter
sprinklers
germplasm

Cite this

Turner, Neil C. ; O'Toole, John C. ; Cruz, R. T. ; Namuco, O. S. ; Ahmad, Sayeed. / Responses of seven diverse rice cultivars to water deficits I. Stress development, canopy temperature, leaf rolling and growth. In: Field Crops Research. 1986 ; Vol. 13, No. C. pp. 257-271.
@article{d06115ab913f4534bcf2d5320caaae94,
title = "Responses of seven diverse rice cultivars to water deficits I. Stress development, canopy temperature, leaf rolling and growth",
abstract = "Predawn and midday leaf water potentials and leaf osmotic potentials, soil water potentials, canopy temperatures, leaf rolling, light interception, dry matter production and water use were followed in seven rice (Oryza sativa L.) cultivars before, during and after the imposition for 10 days of different irrigation treatments by a line source sprinkler system imposed prior to flowering. The seven rice cultivars, Azucena, Tachiminori, IAC 25, IRAT 13, BPI 76, IR 20 and IR 36, represented a wide range of germplasm from traditional dryland to improved wetland types. As soil water potentials in the upper 30 cm of the soil decreased, canopy-to-air temperature differences increased, leaf rolling increased and dry matter production decreased. The wetland cultivars IR 20 and IR 36 had a greater diurnal change in leaf water potential between predawn and midday than the dryland cultivars. Canopy-to-air temperature differences and leaf rolling scores also varied among cultivars. Leaves of the dryland cultivars, particularly Azucena and IAC 25, rolled and had higher canopy-to-air temperature differences at higher waterpotetials and higher turgor pressures than the wetland cultivars IR 20 and IR 36. No differences among cultivars were observed in either the rates of dry during the period of differential irrigation. The stress treatments imposed in the pre-flowering period delayed panicle emergence by 10 days in IAC 25 which was at the boot stage of development, when stress was most severe, and by 4 to 5 days in all other cultivars, some of which emerged up to 30 days after full irrigation had been restored. The results suggest that the physiological differences observed among cultivars, particularly between wetland and dryland types, had little effect on growth and water and water use during a short period of water deficit.",
author = "Turner, {Neil C.} and O'Toole, {John C.} and Cruz, {R. T.} and Namuco, {O. S.} and Sayeed Ahmad",
year = "1986",
doi = "10.1016/0378-4290(86)90027-4",
language = "English",
volume = "13",
pages = "257--271",
journal = "Field Crop Research",
issn = "0378-4290",
publisher = "Pergamon",
number = "C",

}

Responses of seven diverse rice cultivars to water deficits I. Stress development, canopy temperature, leaf rolling and growth. / Turner, Neil C.; O'Toole, John C.; Cruz, R. T.; Namuco, O. S.; Ahmad, Sayeed.

In: Field Crops Research, Vol. 13, No. C, 1986, p. 257-271.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Responses of seven diverse rice cultivars to water deficits I. Stress development, canopy temperature, leaf rolling and growth

AU - Turner, Neil C.

AU - O'Toole, John C.

AU - Cruz, R. T.

AU - Namuco, O. S.

AU - Ahmad, Sayeed

PY - 1986

Y1 - 1986

N2 - Predawn and midday leaf water potentials and leaf osmotic potentials, soil water potentials, canopy temperatures, leaf rolling, light interception, dry matter production and water use were followed in seven rice (Oryza sativa L.) cultivars before, during and after the imposition for 10 days of different irrigation treatments by a line source sprinkler system imposed prior to flowering. The seven rice cultivars, Azucena, Tachiminori, IAC 25, IRAT 13, BPI 76, IR 20 and IR 36, represented a wide range of germplasm from traditional dryland to improved wetland types. As soil water potentials in the upper 30 cm of the soil decreased, canopy-to-air temperature differences increased, leaf rolling increased and dry matter production decreased. The wetland cultivars IR 20 and IR 36 had a greater diurnal change in leaf water potential between predawn and midday than the dryland cultivars. Canopy-to-air temperature differences and leaf rolling scores also varied among cultivars. Leaves of the dryland cultivars, particularly Azucena and IAC 25, rolled and had higher canopy-to-air temperature differences at higher waterpotetials and higher turgor pressures than the wetland cultivars IR 20 and IR 36. No differences among cultivars were observed in either the rates of dry during the period of differential irrigation. The stress treatments imposed in the pre-flowering period delayed panicle emergence by 10 days in IAC 25 which was at the boot stage of development, when stress was most severe, and by 4 to 5 days in all other cultivars, some of which emerged up to 30 days after full irrigation had been restored. The results suggest that the physiological differences observed among cultivars, particularly between wetland and dryland types, had little effect on growth and water and water use during a short period of water deficit.

AB - Predawn and midday leaf water potentials and leaf osmotic potentials, soil water potentials, canopy temperatures, leaf rolling, light interception, dry matter production and water use were followed in seven rice (Oryza sativa L.) cultivars before, during and after the imposition for 10 days of different irrigation treatments by a line source sprinkler system imposed prior to flowering. The seven rice cultivars, Azucena, Tachiminori, IAC 25, IRAT 13, BPI 76, IR 20 and IR 36, represented a wide range of germplasm from traditional dryland to improved wetland types. As soil water potentials in the upper 30 cm of the soil decreased, canopy-to-air temperature differences increased, leaf rolling increased and dry matter production decreased. The wetland cultivars IR 20 and IR 36 had a greater diurnal change in leaf water potential between predawn and midday than the dryland cultivars. Canopy-to-air temperature differences and leaf rolling scores also varied among cultivars. Leaves of the dryland cultivars, particularly Azucena and IAC 25, rolled and had higher canopy-to-air temperature differences at higher waterpotetials and higher turgor pressures than the wetland cultivars IR 20 and IR 36. No differences among cultivars were observed in either the rates of dry during the period of differential irrigation. The stress treatments imposed in the pre-flowering period delayed panicle emergence by 10 days in IAC 25 which was at the boot stage of development, when stress was most severe, and by 4 to 5 days in all other cultivars, some of which emerged up to 30 days after full irrigation had been restored. The results suggest that the physiological differences observed among cultivars, particularly between wetland and dryland types, had little effect on growth and water and water use during a short period of water deficit.

UR - http://www.scopus.com/inward/record.url?scp=38249043183&partnerID=8YFLogxK

U2 - 10.1016/0378-4290(86)90027-4

DO - 10.1016/0378-4290(86)90027-4

M3 - Article

VL - 13

SP - 257

EP - 271

JO - Field Crop Research

JF - Field Crop Research

SN - 0378-4290

IS - C

ER -