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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (7): 6-12.doi: 10.11924/j.issn.1000-6850.2014-1941

Special Issue: 园艺

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Studies on the Diurnal Variation of Chlorophyll fluorescenceParameters of Different Walnut Varieties

  

  • Received:2014-07-15 Revised:2015-02-27 Accepted:2015-01-09 Online:2015-04-03 Published:2015-04-03

Abstract: In order to elucidate different walnut cultivars resistance characteristics, and chlorophyll fluorometry of diurnal variation were compared in walnut cultivars. Five walnut cultivars and the rules of diurnal variation were tested in the manuscript. The results showed that the bottom value of Fm, Fv/Fm, qP and Yield appeared in the midday, and showed decline-rise in the diurnal variation. On the other hand, the trends of NPQ and ETR presented droping-riseing, and the peak value appeared at midday with strong sunlight. F0 varied as a two-peaked curve in ‘Wen 185’ and ‘Xinxin 2’ at 12:00 and 16:00, respectively. The single peak value was showed in cultivars of ‘Wen 138’, ‘Zhipi’, and ‘Xincuifeng’. Chlorophyll fluorescence parameters of different varieties appeared to be different in response to light and temperature. It could be used as the features to tolerant photo inhibition. A comprehensive analysis of the nut appearance quality and fluorescence parameters showed that ‘Wen 138’ and ‘Xincuifeng’ appeared better tolerance to high light stress, which were better replace varieties to the present cultivars.