Abstract
Visual symptoms of N, P, K, Ca, Mg, Mn, Fe and B deficiencies were induced in Caladium × hortulanum Birdsey ‘Candidum’. Characteristic symptoms were photographed and described and a key summarizing these symptoms follows:
a. Chlorosis or necrosis not expressed;
b. Petioles brittle and/or leaves orbicular.........................................................................................................................B
bb. Plants grow slowly, but have no other symptoms......................................................................................................P
bbb. Rust colored spots on underside of leaf near petiole, spots may become “windows” (only the cuticle and epidermal layer remain)................................................................................................................................................. Ca
aa. Chlorosis and/or necrosis expressed;
b. Chlorosis primary symptom.
c. Interveinal and veinal chlorosis
d. Chlorosis evident as leaves unfurl............................................................................................................... Mn
dd. Chlorosis not evident as leaves unfurl, older leaf blades and veins may turn bright yellow as they abscise................................................................................................................................................................... N
cc. Interveinal chlorosis...................................................................................................................................................Fe
bb. Both chlorosis and necrosis expressed.
c. Interveinal chlorosis developing into necrotic spots, leaves turn bright yellow (except basal veins remain green) as they abscise............................................................................................................................................. Mg
cc. Necrotic specks (@ 1 mm) near veins, general chlorosis............................................................................... Mn
bbb. Necrosis primary symptom.
c. Necrotic lesions (2–5 cm) on leaf apex and distal m argin.................................................................................K
cc. Marginal necrosis.
d. Necrosis spreads toward the center of the leaf, margins dry but the leaf blade around petiole remains intact.......................................................................................................................................................................K
dd. Interveinal rust colored, blotchy areas.........................................................................................................Ca
Iron-deficiency symptoms are observed on some genotypes of potato (Solanum tuberosum L.) grown on high-pH and calcareous soils. seven potato cultivars differing in response to iron deficiency chlorosis (FeDC) were grown on high-pH (8.1), calcareous (38% calcium carbonate equivalent in surface 20 cm) and silty clay soil in the field (Beka'a Valley, Lebanon), to determine the effects of FeDC on tuber yield of cultivars sprayed with Fe. A significant interactions between cultivars and Fe spray treatment were noted for visual FeDC ratings and tuber yield. Even though only slight FeDC was noted on some cultivars receiving no Fe spray, tuber yields were significantly increased when sprayed with Fe. Some cultivars with moderate FeDC ratings did not show a significant increase in yield when sprayed with Fe while other cultivars did. Sprayed cultivars generally produced higher tube; yields than unsprayed ones. Indicating that Fe-deficiency chlorosis in the Mediterranean region may be a serious limitation to potato tuber yield.
improve fruit visual, nutritional, and flavor quality. The identification of nutrient deficiency symptoms is relatively complex, due to the various biological functions and interactions that occur between nutrients and the environment, and even similar
Palms are increasingly popular as landscape plants in tropical to warm temperate regions of the United States and as interiorscape plants elsewhere. While visible nutrient deficiency symptoms are relatively uncommon on dicot trees found in
certain level of nutrient deficiency. Characterization of plant development and nutrient deficiency symptoms could aid in diagnosing nutrient disorders and distinguishing nutrient imbalances from other disorders caused by pathogens, chemical damage, or
develop moderate to severe K, Mg or both deficiency symptoms on south Florida’s sandy, nutrient-poor soils. These deficiencies are not only unsightly, but also cause premature senescence of the older leaves, leading to complete defoliation by April. Thus
solution. The observation of deficiency symptoms 1 d after B deprivation supports our findings of symptoms persisting after a complete nutrient solution was reintroduced. Sampling for tissue concentrations of B and Ca once symptoms are visible may cause
the chlorophyll fluorescence parameters of two sweetpotato varieties. Discussion Plant growth and physiological response to K + deficiency. Plants require K + in a larger amount than any other mineral element except for N, and K + is a nutrient that
distribution in citrus under different acidic soil pH conditions. Our study aimed to determine the combined effects of low pH and B deficiency on the performance of ‘HB’ pummelo seedlings, including plant growth, gas exchange, and mineral nutrient accumulation
Nitrogen is a major nutrient element that is required in large quantity by plants including turfgrasses to maintain active cell growth. However, reducing N fertility is often recommended in turfgrass management to prevent excessive shoot growth or