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4. Two cultivars of peanut (Arachis hypogaea) seedlings show different tolerance to calcium deficiency

Author

Gao Li-Li, Wang Sheng-Feng, Liu Zi-Fei, Huang Jin-Sheng, Hilman, Liu Rong-Le, and Wang Hong

Subjects
0106 biological sciences, Plant growth, Physiology, fungi, food and beverages, chemistry.chemical_element, Chromosomal translocation, 04 agricultural and veterinary sciences, Calcium, Biology, 01 natural sciences, Root apex, Arachis hypogaea, chemistry, Root length, Agronomy, Shoot, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Cultivar, Agronomy and Crop Science, 010606 plant biology & botany
Abstract

The objectives were to determine whether two peanut cultivars show different tolerance to calcium (Ca) deficiency. The seedlings of cultivars LH11 and YZ9102 at first trifoliate leaf stage were transplanted in nutrient solution for 28 days with 0.01 and 2.0 mmol/L Ca treatments. Low Ca supply did not affect plant growth, root length and surface area of YZ9102, whereas decreased plant biomass, root length and surface area of LH11 seedlings that appeared necrosis in shoot tip. YZ9102 plant had higher Ca concentration and more Ca distribution to leaves than LH11. Under limited Ca condition, LH11 appeared net Ca2+ effluxes in the zones of 0.2 ∼ 1.5 mm from root apex, while YZ9102 roots maintained net Ca2+ influxes. Peanut cultivar YZ9102 seedlings had longer roots and higher capacities of Ca uptake and Ca translocation to shoots than LH11, which might be account for higher tolerance to Ca deficiency compared with LH11.

Published
2015

6. [Fourier transform infrared spectral analysis on peanut (Arachis Hypogaea) plants under calcium deficiency stress].

Author

Gao LL, Wang SF, Han Y, Liu ZF, Huang JS, Hilman, Liu RL, and Wang H

Subjects
Biomass, Plant Leaves, Plant Roots, Seedlings, Spectroscopy, Fourier Transform Infrared, Stress, Physiological, Arachis physiology, Calcium metabolism
Abstract

The objective of the present study was to reveal different tolerance of peanut plants to Ca deficiency by determining Ca uptake and Fourier transform infrared spectral (FTIR) differences of two peanut cultivars grown in nutrition solution. Peanut cultivars LH11 and YZ9102 were selected. Seedlings at the first leaf stage were cultivated for 28 days in nutrient solution with 0, 0.01 and 2.0 mmol x L(-1) Ca treatments, respectively. The results showed that under 0 and 0.01 mmol x L(-1) Ca supply, YZ9102 did not show Ca deficiency symptoms and the plant biomass did not change, whereas LH11 exhibited shoot-tip necrosis, smaller plant size, more lateral branches, and plant dry matter weights decreased significantly. YZ9102 had higher plant Ca concentration and Ca accumulation than LH11. Besides, for LH11, Ca was mainly accumulated in roots, while for YZ9102 mainly in leaves. As compared with plants cultivated in 2.0 mol x L(-1) Ca nutrition, root, stem and leaf of LH11 plants under Ca deficiency stress showed higher transmittance at peaks 1 060, 1 380, 1 655, 2 922, and 3 420 cm(-1) in FTIR spectra, indicating that the contents of protein, sugar and lipid decreased obviously in LH11 plants in condition that Ca supply was limited. However, the FTIR spectra of YZ9102 were less affected by Ca deficiency. It is suggested that YZ9102 might be more tolerant to Ca deficiency.

Published
2014

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