Plant growth, productivity, and seed yield depend on the efficient uptake, metabolism, and allocation of nutrients. Nitrogen is an essential macronutrient needed in high amounts. Plants have evolved efficient and sele...Plant growth, productivity, and seed yield depend on the efficient uptake, metabolism, and allocation of nutrients. Nitrogen is an essential macronutrient needed in high amounts. Plants have evolved efficient and selective transport systems for nitrogen uptake and transport within the plant to sustain development, growth, and finally reproduction. This review summarizes current knowledge on membrane proteins involved in transport of amino acids and peptides. A special emphasis was put on their function in planta. We focus on uptake of the organic nitrogen by the root, source-sink partitioning, and import into floral tissues and seeds.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
基金Research in M.T.＇s laboratory was supported by the US National Science Foundation （IOS 0135344 and IOS 0448506） and by the Agricultural and Food Research Initiative Competitive Grant no. 2010-65115-20382 from the USDA National Institute of Food and Agriculture. Work in D.R.＇s laboratory was supported by grants from the Swiss National Science Foundation 3100A0-107507 and 31003A 127340, and EU Marie Curie Research Training Network ＇VaTEP - Vacuolar Transport Equipment for Growth Regulation of Plants＇ （M RTN-CT-2006-035833）. No conflict of interest declared.
文摘Plant growth, productivity, and seed yield depend on the efficient uptake, metabolism, and allocation of nutrients. Nitrogen is an essential macronutrient needed in high amounts. Plants have evolved efficient and selective transport systems for nitrogen uptake and transport within the plant to sustain development, growth, and finally reproduction. This review summarizes current knowledge on membrane proteins involved in transport of amino acids and peptides. A special emphasis was put on their function in planta. We focus on uptake of the organic nitrogen by the root, source-sink partitioning, and import into floral tissues and seeds.
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.
