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This collection reviews current research on understanding nutrient
cycles, the ways crops process nutrients, the environmental effects
of fertilizer use and how this understanding can be used to improve
nutrient use efficiency for a more resource-efficient and
climate-smart agriculture. Parts 1-3 summarise research on the
primary macronutrients: nitrogen, phosphorus and potassium.
Chapters review what we know about nutrient cycles, crop nutrient
processing, potential environmental effects and ways of optimising
nutrient use efficiency (NUE). The fourth section of the book
discusses secondary macronutrients and micronutrients including:
calcium, iron, zinc, boron, manganese and molybdenum as well as
soil organic matter. The final part of the book reviews research on
optimising fertiliser use. Chapters cover topics such as assessing
nutrient availability and advances in integrated plant nutrient
management. Other chapters discuss enhanced efficiency fertilisers,
the use of bio-effectors/bio-stimulants, fertigation techniques,
foliar fertilizers and the use of treated wastes in crop nutrition.
An understanding of the mineral nutrition of plants is of
fundamental importance in both basic and applied plant sciences.
The fourth edition of this book retains the aim of the first in
presenting the principles of mineral nutrition in the light of
current advances. Marschner's Mineral Nutrition of Higher Plants,
4th Edition, is divided into two parts: Nutritional Physiology and
Plant-Soil Relationships. In Part I, emphasis is given on uptake
and transport of nutrients in plants, root-shoot interactions, role
of mineral nutrition in yield formation, stress physiology, water
relations, functions of mineral nutrients and contribution of plant
nutrition to nutritional quality, disease tolerance, and global
nutritional security of human populations. In view of the
increasing interest in plant-soil interactions. Part II focuses on
the effects of external and internal factors on root growth,
rhizosphere chemistry and biology, soil-borne ion toxicities, and
nutrient cycling. Now with color figures throughout, this book
continues to be a valuable reference for plant and soil scientists
and undergraduate and graduate students in the fields of plant
nutrition, nutritional physiology, and soil fertility.
Control of intracellular ion homeostasis is pivotal to plant salt
tolerance. Plants have developed a number of mechanisms to keep
ions at appropriate concentrations. Both transporters and channels
on the plasma membrane play important roles in this function. Plant
cyclic nucleotide-gated channels (CNGCs) in the plasma membrane are
non-selective monovalent and divalent cation channels. So far, most
studies on plant CNGCs have been conducted on heterologous systems.
In planta, reverse genetic studies revealed the role of different
CNGCs in cation uptake, transport and homeostasis. However, there
is little information available about the functional
characteristics of plant CNGCs. Altered K+, Ca2+ and Mg2+ internal
concentrations in AtCNGC10 antisense lines compared with WT plants
under non-salt conditions indicated disturbed long distance ion
transport, especially xylem loading/retrieval and/or phloem
loading. The salt overly sensitive gene (SOS1) encodes the Na+/H+
antiporter in the root-cell plasma membrane. The current study
shows that the SOS1 transporter is involved in H+ influx into the
meristem zone of Arabidopsis roots, or it may function as a Na+/H+
antiporter.
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