The effects of temperature and moisture content on physiological and biochemical characteristics of Chinese Fir and Masson Pine seeds were investigated during a year storage period. The investigating indexes are germi...The effects of temperature and moisture content on physiological and biochemical characteristics of Chinese Fir and Masson Pine seeds were investigated during a year storage period. The investigating indexes are germination percentage, the relative electrical conductivity, SOD and POD activity as well as MDA content. The results showed that 1) the germination percentage of both Chinese Fir and Masson Pine seeds were found to reduce over the storage duration when stored in different temperature and moisture content regime. But there are significant difference in the extent of reduction among different temperature and moisture content regime. The best storage condition for Chinese Fir seeds is in the temperature of -30 ℃ or -18 ℃ with the moisture content of 4%, and the best storage condition for Masson Pine seeds is in the temperature of 3 ℃ and -18 ℃ with moisture content of 4%. 2) The relative electrical conductivity, SOD and POD activity as well as MDA content of both Chinese Fir and Masson Pine seeds were changed slowly while stored in low temperature and low moisture content. When the storage temperature and moisture content were increased, however, the relative electrical conductivity and MDA content gradually increased and SOD and POD activity showed a tendency of reduction. 3) When stored in -30 ℃ for 360 days, the seed of Chinese Fir with a moisture content of 4% has the smallest deteriorative rate whereas -18 ℃ is the case of Masson Pine seeds with the same moisture content.展开更多
This paper is dealt with genetic variation of cold tolerance of ten representative of seed sources of masson pine which were raised and planted at three locations,Tonglu of Zhejiang,Liuan of Anhui and Tongbo of Henan....This paper is dealt with genetic variation of cold tolerance of ten representative of seed sources of masson pine which were raised and planted at three locations,Tonglu of Zhejiang,Liuan of Anhui and Tongbo of Henan.The results showed that there existed marked interprovenance variations and no significant intraprovenance variations for relative freezing damage and bud set index of seedlings at all three sites.Electroconductivities of the southern,central and northern seed sources were found to performed various change patterns under different low temperature treatments or different treatment duration at the same low temperature.The correlation analysis indicated that the electroconductivities were strongly and positively related to relative freezing damage and negatively to bud set index.The high and negative correlation was be evident between relative freezing damage and bud set index.The estimated broad heritabilities of freezing damage and bud set index were 0.76～0.86 and 0.59～0.63 respectively.展开更多
文摘The effects of temperature and moisture content on physiological and biochemical characteristics of Chinese Fir and Masson Pine seeds were investigated during a year storage period. The investigating indexes are germination percentage, the relative electrical conductivity, SOD and POD activity as well as MDA content. The results showed that 1) the germination percentage of both Chinese Fir and Masson Pine seeds were found to reduce over the storage duration when stored in different temperature and moisture content regime. But there are significant difference in the extent of reduction among different temperature and moisture content regime. The best storage condition for Chinese Fir seeds is in the temperature of -30 ℃ or -18 ℃ with the moisture content of 4%, and the best storage condition for Masson Pine seeds is in the temperature of 3 ℃ and -18 ℃ with moisture content of 4%. 2) The relative electrical conductivity, SOD and POD activity as well as MDA content of both Chinese Fir and Masson Pine seeds were changed slowly while stored in low temperature and low moisture content. When the storage temperature and moisture content were increased, however, the relative electrical conductivity and MDA content gradually increased and SOD and POD activity showed a tendency of reduction. 3) When stored in -30 ℃ for 360 days, the seed of Chinese Fir with a moisture content of 4% has the smallest deteriorative rate whereas -18 ℃ is the case of Masson Pine seeds with the same moisture content.
文摘This paper is dealt with genetic variation of cold tolerance of ten representative of seed sources of masson pine which were raised and planted at three locations,Tonglu of Zhejiang,Liuan of Anhui and Tongbo of Henan.The results showed that there existed marked interprovenance variations and no significant intraprovenance variations for relative freezing damage and bud set index of seedlings at all three sites.Electroconductivities of the southern,central and northern seed sources were found to performed various change patterns under different low temperature treatments or different treatment duration at the same low temperature.The correlation analysis indicated that the electroconductivities were strongly and positively related to relative freezing damage and negatively to bud set index.The high and negative correlation was be evident between relative freezing damage and bud set index.The estimated broad heritabilities of freezing damage and bud set index were 0.76～0.86 and 0.59～0.63 respectively.
