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Titolo:
The importance of light intensity for pollen tube growth and embryo survival in wheat x maize crosses
Autore:
Campbell, AW; Griffin, WB; Burritt, DJ; Conner, AJ;
Indirizzi:
New Zealand Inst Crop & Food Res Ltd, Christchurch, New Zealand New Zealand Inst Crop & Food Res Ltd Christchurch New Zealand w Zealand Lincoln Univ, Soil Plant & Ecol Sci Div, Canterbury, New Zealand Lincoln Univ Canterbury New Zealand ol Sci Div, Canterbury, New Zealand Univ Otago, Dept Bot, Dunedin, New Zealand Univ Otago Dunedin New Zealand iv Otago, Dept Bot, Dunedin, New Zealand
Titolo Testata:
ANNALS OF BOTANY
fascicolo: 4, volume: 87, anno: 2001,
pagine: 517 - 522
SICI:
0305-7364(200104)87:4<517:TIOLIF>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
HORDEUM-VULGARE-L; TRITICUM-AESTIVUM L; SECALE-CEREALE-L; HEXAPLOID WHEAT; CHROMOSOME ELIMINATION; HAPLOID PRODUCTION; BULBOSUM L; GRAIN GERMINATION; PEARL-MILLET; TEMPERATURE;
Keywords:
intergeneric hybridization; light intensity; pollen tube growth; embryo survival; Triticum aestivum; wheat; Zea mays; maize;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Campbell, AW Univ So Queensland, Fac Sci, Ctr Rural & Environm Biotechnol,Toowoomba, Qld 4350, Australia Univ So Queensland Toowoomba Qld Australia4350 0, Australia
Citazione:
A.W. Campbell et al., "The importance of light intensity for pollen tube growth and embryo survival in wheat x maize crosses", ANN BOTANY, 87(4), 2001, pp. 517-522

Abstract

The success of Triticum aestivum x Zea mays crosses, used to produce whealdoubled haploids, is influenced by light intensity. To examine the basis for this response, pollen tube growth, embryo survival and indicators of photosynthetic rate were measured in two wheat cultivars ('Karamu' and 'Kotuku') crossed with maize at two irradiance levels (250 or 750 mu mol m(-2) s(-1), PAR). pollen tube growth was significantly affected by light intensity in 'Karamu' plants but not in 'Kotuku' plants, despite both cultivars beingpollinated by the same maize source. The percentage of pollen tubes reaching the cavity between the ovarian wall and integuments, or in the micropyleof 'Karamu' plants at high light intensity (65%) was nearly three-times greater than that at low light intensity (22%). Thus. either low light intensity can affect the maternal wheat plant in a way that inhibits pollen tube growth and/or high light intensity may promote pollen tube growth in 'Karamu' plants. Significant differences in rates of electron transport in plantsgrown at the two light intensities indicated that the rate of photosynthesis may also have an effect on pollen tube growth. These results have importance for improving the efficiency of wheat x maize crosses and other wide cereal crosses. (C) 2001 Annals of Botany Company.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 08:19:25