Response of chickpea (Cicer arietinum L.) to terminal drought: leaf stomatal conductance, pod abscisic acid concentration, and seed set

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Abstract

Flower and pod production and seed set of chickpea (Cicer arietinum L.) are sensitive to drought stress. A 2-fold range in seed yield was found among a large number of chickpea genotypes grown at three dryland field sites in south-western Australia. Leaf water potential, photosynthetic characteristics, and reproductive development of two chickpea genotypes with contrasting yields in the field were compared when subjected to terminal drought in 106 kg containers of soil in a glasshouse. The terminal drought imposed from early podding reduced biomass, reproductive growth, harvest index, and seed yield of both genotypes. Terminal drought at least doubled the percentage of flower abortion, pod abscission, and number of empty pods. Pollen viability and germination decreased when the fraction of transpirable soil water (FTSW) decreased below 0.18 (82% of the plant-available soil water had been transpired); however, at least one pollen tube in each flower reached the ovary. The young pods which developed from flowers produced when the FTSW was 0.50 had viable embryos, but contained higher abscisic acid (ABA) concentrations than those of the well-watered plants; all pods ultimately aborted in the drought treatment. Cessation of seed set at the same soil water content at which stomata began to close and ABA increased strongly suggested a role for ABA signalling in the failure to set seed either directly through abscission of developing pods or seeds or indirectly through the reduction of photosynthesis and assimilate supply to the seeds.

Original languageEnglish
Pages (from-to)1973-1985
Number of pages13
JournalJournal of Experimental Botany
Volume68
Issue number8
DOIs
Publication statusPublished - 20 Apr 2016

Cite this

@article{a546351bc66e46deb170350a007e7c45,
title = "Response of chickpea (Cicer arietinum L.) to terminal drought: leaf stomatal conductance, pod abscisic acid concentration, and seed set",
abstract = "Flower and pod production and seed set of chickpea (Cicer arietinum L.) are sensitive to drought stress. A 2-fold range in seed yield was found among a large number of chickpea genotypes grown at three dryland field sites in south-western Australia. Leaf water potential, photosynthetic characteristics, and reproductive development of two chickpea genotypes with contrasting yields in the field were compared when subjected to terminal drought in 106 kg containers of soil in a glasshouse. The terminal drought imposed from early podding reduced biomass, reproductive growth, harvest index, and seed yield of both genotypes. Terminal drought at least doubled the percentage of flower abortion, pod abscission, and number of empty pods. Pollen viability and germination decreased when the fraction of transpirable soil water (FTSW) decreased below 0.18 (82{\%} of the plant-available soil water had been transpired); however, at least one pollen tube in each flower reached the ovary. The young pods which developed from flowers produced when the FTSW was 0.50 had viable embryos, but contained higher abscisic acid (ABA) concentrations than those of the well-watered plants; all pods ultimately aborted in the drought treatment. Cessation of seed set at the same soil water content at which stomata began to close and ABA increased strongly suggested a role for ABA signalling in the failure to set seed either directly through abscission of developing pods or seeds or indirectly through the reduction of photosynthesis and assimilate supply to the seeds.",
keywords = "Abscisic acid, flower abortion, fraction of transpirable soil water, photosynthesis, pod abortion, pollen viability and germination, seed filling, water deficit, MEDITERRANEAN-TYPE ENVIRONMENT, SEASON GRAIN LEGUMES, WATER-DEFICIT, ABA CONTENT, STRESS, GROWTH, GENOTYPES, ABORTION, YIELD, WHEAT",
author = "Jiayin Pang and Turner, {Neil C.} and Tanveer Khan and Du, {Yan Lei} and Jun-Lan Xiong and Colmer, {Timothy D.} and Rosangela Devilla and Katia Stefanova and Siddique, {Kadambot H. M.}",
year = "2016",
month = "4",
day = "20",
doi = "10.1093/jxb/erw153",
language = "English",
volume = "68",
pages = "1973--1985",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "OXFORD UNIV PRESS UNITED KINGDOM",
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TY - JOUR

T1 - Response of chickpea (Cicer arietinum L.) to terminal drought

T2 - leaf stomatal conductance, pod abscisic acid concentration, and seed set

AU - Pang, Jiayin

AU - Turner, Neil C.

AU - Khan, Tanveer

AU - Du, Yan Lei

AU - Xiong, Jun-Lan

AU - Colmer, Timothy D.

AU - Devilla, Rosangela

AU - Stefanova, Katia

AU - Siddique, Kadambot H. M.

PY - 2016/4/20

Y1 - 2016/4/20

N2 - Flower and pod production and seed set of chickpea (Cicer arietinum L.) are sensitive to drought stress. A 2-fold range in seed yield was found among a large number of chickpea genotypes grown at three dryland field sites in south-western Australia. Leaf water potential, photosynthetic characteristics, and reproductive development of two chickpea genotypes with contrasting yields in the field were compared when subjected to terminal drought in 106 kg containers of soil in a glasshouse. The terminal drought imposed from early podding reduced biomass, reproductive growth, harvest index, and seed yield of both genotypes. Terminal drought at least doubled the percentage of flower abortion, pod abscission, and number of empty pods. Pollen viability and germination decreased when the fraction of transpirable soil water (FTSW) decreased below 0.18 (82% of the plant-available soil water had been transpired); however, at least one pollen tube in each flower reached the ovary. The young pods which developed from flowers produced when the FTSW was 0.50 had viable embryos, but contained higher abscisic acid (ABA) concentrations than those of the well-watered plants; all pods ultimately aborted in the drought treatment. Cessation of seed set at the same soil water content at which stomata began to close and ABA increased strongly suggested a role for ABA signalling in the failure to set seed either directly through abscission of developing pods or seeds or indirectly through the reduction of photosynthesis and assimilate supply to the seeds.

AB - Flower and pod production and seed set of chickpea (Cicer arietinum L.) are sensitive to drought stress. A 2-fold range in seed yield was found among a large number of chickpea genotypes grown at three dryland field sites in south-western Australia. Leaf water potential, photosynthetic characteristics, and reproductive development of two chickpea genotypes with contrasting yields in the field were compared when subjected to terminal drought in 106 kg containers of soil in a glasshouse. The terminal drought imposed from early podding reduced biomass, reproductive growth, harvest index, and seed yield of both genotypes. Terminal drought at least doubled the percentage of flower abortion, pod abscission, and number of empty pods. Pollen viability and germination decreased when the fraction of transpirable soil water (FTSW) decreased below 0.18 (82% of the plant-available soil water had been transpired); however, at least one pollen tube in each flower reached the ovary. The young pods which developed from flowers produced when the FTSW was 0.50 had viable embryos, but contained higher abscisic acid (ABA) concentrations than those of the well-watered plants; all pods ultimately aborted in the drought treatment. Cessation of seed set at the same soil water content at which stomata began to close and ABA increased strongly suggested a role for ABA signalling in the failure to set seed either directly through abscission of developing pods or seeds or indirectly through the reduction of photosynthesis and assimilate supply to the seeds.

KW - Abscisic acid

KW - flower abortion

KW - fraction of transpirable soil water

KW - photosynthesis

KW - pod abortion

KW - pollen viability and germination

KW - seed filling

KW - water deficit

KW - MEDITERRANEAN-TYPE ENVIRONMENT

KW - SEASON GRAIN LEGUMES

KW - WATER-DEFICIT

KW - ABA CONTENT

KW - STRESS

KW - GROWTH

KW - GENOTYPES

KW - ABORTION

KW - YIELD

KW - WHEAT

U2 - 10.1093/jxb/erw153

DO - 10.1093/jxb/erw153

M3 - Article

VL - 68

SP - 1973

EP - 1985

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 0022-0957

IS - 8

ER -