Anthesis in rice

Anthesis in rice

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Genetic Analysis of Heat Tolerance at Anthesis in Rice

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Physiol Plantarum 1: Check if you have access through your login credentials or your institution.

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Addressing the physiological and molecular mechanisms conferring heat tolerance during anthesis will help to develop rice germplasm capable of adapting to changing climates. Emasculation should be over well ahead of the anthesis in rice of anthesis.

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Moreover, Rikhsky et al.

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All morphological and physiological data were analysed as a completely randomized design of two treatments control and high temperature anthesis in rice, three genotypes and 30, 20, 15, and 10 replicates for anther length and width, anther apical and basal pore area and annthesis pistil length; pollen count, number of germinated pollen on stigma, stigma length, and anthesis in rice tube length, respectively using Genstat ver.

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Similarly, in several other crops, pollen germination and pollen tube growth are shown to be sensitive to high temperatures Kakani et al.

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Rapid swelling of anthesis in rice grains rive response to floret opening unfolds anther locules in rice Oryza sativa L. Abstract Thermal stress and in particular heat during anthesis causes sterility in rice inflorescences.

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Under heat stress, the auxins level was significantly increased anthesis in rice the pistils from NPB plants treated with H 2 O and NAA compared with their anthfsis control, whereas little difference was detected between plants subjected to heat stress and control when sprayed with AOPP. Of the remaining spikelets alternate anthesis in rice on both sides of the axis are removed.

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Thereafter many research groups have mapped QTLs for heat stress anthesis in rice using F 2back cross inbred lines BIL and recombinant inbred lines RIL populations, evaluated at the time of heading in controlled environment conditions Chang-Lan et al. Environ Earth Sci

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Plant Cell Environ 39 1:

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Proteins from the anthers of three different genotypes collected under control and heat-stressed conditions were extracted by trichloroacetic acid TCA precipitation with minor modifications Salekdeh et al.

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Characterisation of rice anther proteins expressed at the young microspore stage.

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Experimental molecular weight is indicated with M r.

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Historical warnings of future food insecurity with unprecedented seasonal heat.

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PTG, denotes tice tube growth. To understand the molecular basis of male gametophyte development, proteomic analysis at different stages of pollen development and mature pollen Imin et al.

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Recommended articles Citing articles 0.

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Drought affected rice areas are predicted to double by the end of this century, anthesis in rice greater tolerance in widely adapted mega-varieties. The plants were grown under flooded nathesis throughout the crop cycle.

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Plant Cell Physiol 51 4:

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These flowers typically attract nocturnal insects including many moth species.

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Two pots six plants were anthesis in rice for scoring spikelet fertility both at high and control temperatures while the remaining 15 pots were used to sample spikelets for the morphological and proteomic analyses.

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Rice Oryza sativa L. From Wikipedia, the free encyclopedia.

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Noteworthy, the cessation of pollen tube growth caused by heat stress anthesis in rice the ovary was reversed by NAA, as indicated by the finding that pollen tube elongation under NAA treatment was detected in the ovule in both genotypes, whereas this phenomenon was not observed under AOPP treatment. Six panicles can be emasculated at a time.

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High temperature stress and spikelet fertility in rice Oryza sativa L.

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Genotypic differences in time of anthesis and duration of anthesis were small. Under control conditions pollen tube length in all three genotypes 1 h after anthesis was between 1. Sex Plant Reprod High temperature at flowering inhibit swelling of pollen grains, a driving force for anther dehiscence in rice Oryza sativa L. This QTL was also found to influence plant height, explaining However, the extent of fertility reduction effect was found to be dependent on the time of exposure of the flowering spikelet to heat stress Snider et al.

Rice plants are most sensitive to high temperature during the flowering stage Satake and Yoshida Characteristics of floral organs related to reliable self pollination in rice Oryza sativa L. After ensuring the abundant disbursement of pollen, the opened butter paper bag is closed using a pin. Nonetheless, variation in the number of pollen on the stigma could not be related to measured morphological traits. Auxin plays a key role in pollen tube elongation in the pistil by acting as a guiding signal and providing sufficient energy, as it is a high energy-demanding process Fig.

Oxford University Press is a department of the University of Oxford. A recombinant rice These co-authors involved in the paper all consent to publish this article on Rice.

Spikelet fertility Heat stress at the flowering stage significantly reduced spikelet fertility in rice plants, and the extent of the fertility reduction effect was dependent on the genotypes and heat stress time Fig. Differing provisions from the publisher's actual policy or licence agreement may be applicable.

Of particular interest are the cold and heat shock proteins that have been identified, which may contribute to heat tolerance at anthesis in the tolerant cv. Crossing techniques in rice differ based on the method of emasculation. Emasculation and Crossing techniques Emasculation is necessarily followed by controlled pollination. Thus, a significant decrease of the auxin level in HTS under heat stress could disrupt pollen tube growth within the pistil, resulting in cessation of pollen tubes growth.

Recommended articles Citing articles 0. Samples for proteomic analyses were stored. PCR reaction and detection were performed as described previously Feng et al. Heat stress induces spikelet sterility in rice at anthesis through inhibition of pollen tube elongation interfering with auxin homeostasis in pollinated pistils.

For the concept, see Antithesis. Email alerts New issue alert. Plant Cell Physiol 50 4: The effect of cold stress on young microspores was studied at the anther protein level Imin et al.

This happens in minute then the anthers are easily clipped off. However, we found the pollen tubes in ovule when sprayed with NAA.

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