New Zealand Journal of Crop and Horticultural Science abstracts

---

Short communication: Some observations on the influence of temperature
on the germination of pollen on excised nashi (Pyrus serotina Rehder var. culta Rehder) flowers

B. H. ROHITHA
D. J. KLINAC

The Horticulture and Food Research Institute
of New Zealand
Ruakura Research Centre
Private Bag 3123
Hamilton, New Zealand

Abstract  Pollen germination on excised nashi (Pyrus serotina Rehder var. culta Rehder) styles was compared at six constant temperatures (4, 17, 12,16, 20, and 25deg.C). After 24 h pollen germination was highest at 12deg.C for the cultivar `Shinsui'. For the cultivars `Hosui', `Kosui', `Nijisseiki', and `Shinseiki', the optimum temperature for pollen germination was between 16 and 20deg.C. The (green-skinned) cultivars `Nijisseiki' and `Shinseiki' showed higher levels of pollen germination and a higher optimum temperature than the (russeted) cultivars--`Hosui', `Kosui', and `Shinsui'. Field temperatures over the flowering period were lower than these in vitro optima, and so may have contributed to the varying levels of seed set observed.

Keywords  nashi, Asian pear; Pyrus serotinia; pollination; seed set; temperature; pollen

New Zealand Journal of Crop and Horticultural Science, 1994, Vol. 22: 339-342

0114-0671/94/2203-0339 $2.50/0 (c) The Royal Society of New Zealand 1994

PDF file of entire paper: medium quality (847K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page