2001
DOI: 10.2135/cropsci2001.4151517x
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Flower Abortion Caused by Preanthesis Water Deficit Is Not Attributed to Impairment of Pollen in Soybean

Abstract: A large proportion of flowers in the soybean plant [Glycine max (L.) Merr.] abort during development. Water stress imposed during the development of flowers is a major factor increasing the rate of abortion, and long‐term or frequent water deficits during this period might decrease yield. The physiological mechanism underlying this phenomenon remains unclear. The objectives of this study were (i) to discover whether a water deficit imposed on a soybean genotype IX93‐100 prior to anthesis could cause the aborti… Show more

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Cited by 74 publications
(57 citation statements)
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“…A similar result was also reported by Beebe et al (2012) in common bean genotypes. This finding is also in agreement with Nielsen and Nelson (1998) who observed a reduction in the number of pods in plants subjected to drought; that effect could have been due to ovule or pollen abortion (Kokubun et al 2001) and also due to increase of ethylene (ABA) production when plants are subjected to drought causing flowers abortion. The mean number of pods plant -1 was reduced by 30% and number of seeds plant -1 by 21%, these suggest that reduction of seed yield in drought conditions is mainly due to number of pods plant -1…”
Section: Effect Of Drought On Yield Components Of Common Bean Genotypsupporting
confidence: 91%
“…A similar result was also reported by Beebe et al (2012) in common bean genotypes. This finding is also in agreement with Nielsen and Nelson (1998) who observed a reduction in the number of pods in plants subjected to drought; that effect could have been due to ovule or pollen abortion (Kokubun et al 2001) and also due to increase of ethylene (ABA) production when plants are subjected to drought causing flowers abortion. The mean number of pods plant -1 was reduced by 30% and number of seeds plant -1 by 21%, these suggest that reduction of seed yield in drought conditions is mainly due to number of pods plant -1…”
Section: Effect Of Drought On Yield Components Of Common Bean Genotypsupporting
confidence: 91%
“…To address the above question, we conducted experiments to clarify a) whether water deficit imposed on a soybean plant prior to flowering caused abortion of the basal flowers on the rachis, which are very likely to develop seed-bearing pods under favorable conditions, and b) whether the abortion, if occurred, was due to the impairment of stamen (pollen) or pistil (ovule) function (Kokubun et al, 2001;Kokubun, 2004). IX93-100 plants were grown for this experiment in controlled environment chambers (30/20ºC day/night temperature, 60 ± 10% relative humidity, 15-h photoperiod at 600 μmol m-2 s -1 PPFD on the plant canopy).…”
Section: Differences Between Pollen and Ovule In Susceptibility To Wamentioning
confidence: 99%
“…It is difficult to identify directly whether pollen and/or pistils are relatively viable under water-stressed conditions. We indirectly evaluated their viability by measuring the pod-set percentages of flowers that were reciprocally crossed between well-watered and deficient plants (Kokubun et al, 2001). The pistils of well-watered plants, even when pollinated with pollen from water-deficient plants, were capable of initiating pods at a considerable rate, whereas water-deficient pistils developed few pods even when crossed with unstressed pollen.…”
Section: Differences Between Pollen and Ovule In Susceptibility To Wamentioning
confidence: 99%
“…Soybean yield is determined by number of pod per plant, number of seed per plant and seed weight and these traits are the most important yield component of soybean (Ohashi and Nakayama, 2009;Kokubun et al, 2001;Kobraee and Shamsi, 2011a). Since the numbers of seeds per pod are genetically controlled, the number of seeds is determined predominately by the number of pods per plant, which is largely dependent on the number of floral buds that initiates pods and attains maturity (Desclaux et al, 2000).…”
Section: Resultsmentioning
confidence: 99%