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Responses to Heat and Cold Stress02:45

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Pollen selection for low temperature adaptation in tomato.

D Zamir1, I Gadish

  • 1The Faculty of Agriculture, Department of Field and Vegetable Crops, The Hebrew University of Jerusalem, P.O. Box 12, 76-100, Rehovot, Israel.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|November 19, 2013
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Summary
This summary is machine-generated.

Tomato progeny from low-temperature pollination showed enhanced root growth in cold conditions. This suggests pollen selection at low temperatures influences offspring

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Area of Science:

  • Plant genetics
  • Environmental stress biology
  • Crop science

Background:

  • Environmental stress impacts plant reproductive success.
  • Low temperatures during pollination can affect offspring traits.
  • Understanding these effects is crucial for crop adaptation.

Purpose of the Study:

  • To investigate the impact of low-temperature pollination on tomato progeny root elongation.
  • To determine if cold stress during pollination influences cold tolerance in offspring.
  • To explore the relationship between pollen selection and sporophytic trait expression under stress.

Main Methods:

  • Conducted pollen selection experiments in tomato (Lycopersicon esculentum).
  • Used interspecific hybrid pollen (L. hirsutum x L. esculentum).
  • Applied pollen to male-sterile plants under controlled low (12°C/7°C) and normal (24°C/18°C) temperatures.
  • Measured root elongation rates of BC1 progeny at 9°C and 24°C.

Main Results:

  • Progeny from low-temperature crosses exhibited higher root elongation rates at 9°C compared to normal-temperature crosses.
  • Root elongation rates were similar at 24°C for both crossing treatments.
  • Seedlings from low-temperature crosses showed less inhibition of root elongation at 9°C, indicating improved cold tolerance.

Conclusions:

  • Low-temperature pollination can confer enhanced cold tolerance to tomato progeny.
  • Results suggest a link between pollen selection under cold stress and the expression of sporophytic traits.
  • This finding has implications for breeding tomatoes adapted to colder climates.