Effect of temperature and radiation on photosynthesis productivity in chestnut populations ( Castanea sativa Mill. cv. Judia)
Effect of temperature and radiation on photosynthesis productivity in chestnut populations ( Castanea sativa Mill. cv. Judia)
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温度和辐射对板栗种群光合作用生产力的影响 (Castanea sativa Mill. cv. Judia)
DOI:
10.1556/aagr.55.2007.2.7
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发表时间:
2007
期刊:
影响因子:
--
通讯作者:
J. Gomes
中科院分区:
文献类型:
--
作者:
P. Almeida;L. Dinis;J. Coutinho;T. Pinto;R. Anjos;J. Ferreira;M. Pimentel;F. Peixoto;J. Gomes
Studies on gas exchange parameters were made at different temperatures and radiation levels in seven seedling populations of chestnut cultivar Judia from different parts of the Tras-os-Montes region, Portugal. Differences were found for the optimal temperature, which was 31°C for JD7, 31.5°C for JD5, 32°C for JD2, 32.5°C for JD4, 33°C for JD3 and JD6, and 33.5°C for JD1 and the ink-resistant hybrid BRO310. At these values, rates of photosynthesis ranged between 8.7 and 13.4 mmol CO 2 m −2 s −1 for JD6 and JD7, while the light conditions allowing 90% of maximal photosynthesis varied between 650 (JD6) and 1385 (JD4) μmol m −2 s −1 . JD1 showed the highest value of leaf water potential, −0.35 Mpa, and JD6, JD7 and BRO310 the lowest, −0.65 Mpa. JD1 also showed the second lowest stomatal conductance (93 mmol m −2 s −1 ) and transpiration rate (3.0 mmol H 2 O m −2 s −1 ).In relation to the photosynthetic pigments, JD3 and JD7 were the most sun-loving clones having the highest values for the Chl a / b ratio (3.2...