Genotypical differences in responses to iron deficiency between sensitive and resistant cultivars of chickpea (Cicer arietinum)

Abstract

Differences in responses to iron deficiency between two chickpea cultivars, NP-62 and K-850, were examined. The apical leaves of NP-62 quickly showed symptoms of iron-deficiency chlorosis when grown on an iron-free medium. By contrast, K-850 showed no visible symptoms on the same medium. Iron contents of the apical leaves of these two cultivars were similar during the first 7 days after they were transferred to the iron-free medium in spite of a marked difference in root-associated Fe 3÷-reduction activity. The susceptibility to i r o n -d e f i c i e n c y chlorosis o b s e r v e d in NP-62 was not attributable to the poor Fe3+-reduction activity of roots but to the inefficient utilization of iron within leaves under conditions when the supply of iron was limited.

Iron sources for citrus rootstock development grown on pine bark/vermiculite mixed substrate

“…In spite of the high Fe concentrations found in the upper apical third of citrus rootstock plants from the control and Fe-EDTA treatments (Table 4), those plants exhibited severe iron deficiency symptoms (Table 2), probably because iron was present in the form of non-reactive ferric ion (Fe 3+ ), according to Pérez-Sanz & Lucena (1995), not being easily used in photosynthesis reactions and formation of chlorophyll pigments (Cataldo et al, 1988). Furthermore, Mohammad et Mean followed by the same small letters in the columns and capital letters in the lines do not differ (Scott-Knott test, P > 0.05).…”

“…Lang et al (1990) observed that the iron extraction in fresh leaves with HCl 1 mol L -1 was a good indicator of the iron status in plants at flowering. Also, Ohwaki & Sugahara (1993) reported that the genotypic differences among Fe-deficient chickpea sensitive and resistant cultivars were attributed to the active iron in leaves grown under iron stress conditions.…”

“…The greater difference compared to other non-chelated Fe-compounds, is that the chelating agent is transported back to the substrate solid phase to chelatize more irons. When the chelate returns to the solution it can chelatize large amounts of iron in a short period of time (Pérez-Sanz & Lucena, 1995).…”

Differences in responses to iron deficiency between two legumes: lentil (Lens culinaris) and chickpea (Cicer arietinum)

“…In sunflower exposed to iron deficiency, lower leaf chlorophyll concentration was associated with reduction of total iron content (Ranieri et al, 2001). However, several studies have indicated that leaves affected by ferric chlorosis can display total iron contents comparable to those of green leaves (Mehrotra et al, 1991;Ohwaki and Sugahara, 1993). According to Mehrotra et al (1991), it is the high ''active'' iron levels in the mitochondria that confer to some cultivars their aptitude to tolerate iron lack.…”

ADDITIONAL NOTE ON INHERITANCE OF FE-DEFICIENCY CHLOROSIS IN CHICKPEA (Cicer arietinum L.)

“…In some gates of these areas, it faces some nutrient deficiencies resulting in seed yield losses. One of the most important problems is iron (Fe) deficiency when the susceptible cultivars are grown in the problematic conditions such as in calcareous soil (Gowda and Smithson, 1980;Singh et al, 1986;Ali et al, 1988;Ali et al, 2000;Ohwaki and Sugahara, 1993;Zaiter and Ghalayini, 1994). Seed yield in the cultivated chickpea can reduce by 50% in Lebanon, Syria and India due to Fe-deficiency (Sakal et al, 1987;Ali et al, 2002).…”