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薄壳山核桃开花特征与可授性研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年03期
Page:
50-54
Column:
研究论文
publishdate:
2014-05-15

Article Info:/Info

Title:
Flowering morphological characteristics, pollen viability and stigma receptivity of Carya illinoinensis
Article ID:
1000-2006(2014)03-0050-05
Author(s):
ZHANG Rui1 LI Hui1 PENG Fangren1* HAO Mingzhuo1 ZHAI Min2
1.College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China;
2 Nanjing Green Universe Pecan Science &
Technology Co., Ltd, Nanjing 210014, China
Keywords:
Carya illinoinensis flowering morphological characteristics pollen viability stigma receptivity
Classification number :
Q944.44
DOI:
10.3969/j.issn.1000-2006.2014.03.010
Document Code:
A
Abstract:
During classified flowering period of nine excellent pecan(Carya illinoinensis)cultivars, flower morphological characteristics, pollen viability and stigma receptivity were measured by taking digital photos, in vitro germination method and benzidine-H2O2testing. The results showed that optimal period for pollens collection was “stage Ⅴ” when the angle between bracts and catkin rachises were about 90° and anthers turned yellow. Among the tested cultivars, ‘Pawnee’ had the highest pollen viability. For the pollen collection, some cultivars like ‘Mahan’ was collected more easily when the open angles of stigmas from 90° turned to more than 90°, other cultivars like “Pawnee” had receptivity from the beginning when stigmas started open and got better when open angles got bigger from 15° to 90°, which were relatively smaller than the fomer. The optimal receptivity time for all cultivars were only lasted 2-3 days. Receptivity would lost when black spots appeared on the stigmas. Pollen spreading time of ‘Pawnee’ overlaid with best stigma receptivity time of ‘Mahan’, and the pollination time of ‘Pawnee’ and ‘Mahan’ was longer than others, so they were suggested to be optimal pollination cultivars.

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Last Update: 2014-05-15