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Start Over Subject Citrus

1. Differential responses of iron, magnesium, and zinc deficiency on pigment composition, nutrient content, and photosynthetic activity in tropical fruit crops

Creator:
Balakrishnan, K., Rajendran, C., and Kulandaivelu, G.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Achras, chlorophyll fluorescence, Citrus, Eugenia, Jamun, Mangifera, mango, nutrient deficiency, sapota, and sweet orange
Language:
Multiple languages
Description:
Fe, Mn, and Zn affected the chlorophyll (Chl) content whereas Fe deficiency caused larger reduction of total chlorophyll content than Mg and Zn deficiencies. Mg deficient mango had a higher Chl a/b ratio than the respective healthy plants. The foliar contents of Fe, Zn, and Mg in the deficient leaves were lower than the critical level. Nutrient deficiency significantly affected the Fv/Fm ratios as observed from the Chl fluorescence induction curves. Fe deficiency resulted in larger reduction of variable fluorescence than Mg and Zn deficiency. and K, Balakrishnan, C. Rajendran, G. Kulandaivelu.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Effects of long-term ozone exposure on citrus: Chlorophyll a fluorescence and gas exchange

Creator:
Calatayud, A., Iglesias, D. J., Talón, M., and Barreno, E.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
chlorophyll fluorescence, Citrus, intercellular CO2 concentration, net photosynthetic rate, ozone, and stomatal conductance
Language:
Multiple languages
Description:
Three-years-old trees of Satsuma mandarin (Citrus unshiu [Mak.] Marc.) cv. Okitsu were exposed to O3 fumigation during long term (one year) in open-top chambers. As a result of the treatment, chlorophyll a fluorescence and gas exchange parameters were modified with respect to trees growing in O3-free conditions. Net photosynthetic rate and stomatal conductance decreased and intercellular CO2 concentration increased according to a reduction of the non-cyclic electron flow and a lower capacity to reduce the quinone pool. O3 also reduced the development of non-photochemical quenching preventing the dissipation of excess excitation energy and, therefore, generated several alterations in photosynthetic apparatus. All these effects were obtained in long-term exposure and higher O3 concentration. In O3 ambient conditions, the effects were minor. and A. Calatayud ... [et al.].
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public