Ovular Tumors and Inhibition of Embryo Growth in Incompatible Crosses of
            <i>Datura</i>

Rappaport, J.; Satina, S.; Blakeslee, Albert Francis

doi:10.1126/science.111.2881.276

Cited by 10 publications

(2 citation statements)

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“…Certain plant hormones, when present in sufficient quantity, cause ovular tumors in Dntzlrn (Rappaport, Satina, and Blalteslee, 1950), rendering complete disorganization of the embryo sac. Ovule abortion occurring from crosses between diploid and tetraploid races of Lycopersico7z is caused by the enveloping hyperplastic endothelium (Cooper and Brinlt, 1915).…”

Section: J 'mentioning

confidence: 99%

Sterility in Certain Gossypium Hybrids. Ii. Postfertilization Phenomena

Oakes¹

1966

Can. J. Genet. Cytol.

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Section: J 'mentioning

confidence: 99%

Sterility in Certain Gossypium Hybrids. Ii. Postfertilization Phenomena

Oakes¹

1966

Can. J. Genet. Cytol.

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“…In other species, photosynthate transport becomes occluded in aborting ovules concurrent with a massive proliferation of integument tissue (Rappaport et al, 1950;Savenchko, 1960;Lacey et al, 1997). In plants where the maternal tissue proliferates, the ovule remains an excellent sink tissue, even though the transfer of assimilates into developing gametophytes or embryos has ceased.…”

Section: Resource Limitation and Embryo Senescencementioning

confidence: 99%

Ovule Abortion in Arabidopsis Triggered by Stress

2004

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Environmental stresses frequently decrease plant fertility. In Arabidopsis, the effect of salt stress on reproduction was examined using plants grown in hydroponic medium. Salt stress inhibited microsporogenesis and stamen filament elongation. Because plants grown in hydroponic media can be rapidly and transiently stressed, the minimum inductive treatment to cause ovule abortion could be determined. Nearly 90% of the ovules aborted when roots were incubated for 12 h in a hydroponic medium supplemented with 200 mM NaCl. The anatomical effects of salt stress on maternal organs were distinct from those in the gametophyte. A fraction of cells in the chalaza and integuments underwent DNA fragmentation and programmed cell death. While three-fourths of the gametophytes aborted prior to fertilization, DNA fragmentation was not detected in these cells. Those gametophytes that survived were fertilized and formed embryos. However, very few of these developing embryos formed seeds; most senesced during seed development. Thus, during seed formation, there were multiple points where stress could prematurely terminate plant reproduction. These decreases in fecundity are discussed with respect to the hypothesis of serial adjustment of maternal investment.

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